Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Journal of Dalian Fisheries University》 2005-04
Add to Favorite Get Latest Update

A comparison of growth and development of Manila Clam (Ruditapes philippinarum) from two pedigrees

YAN Xi-wu~(1), ZHANG Guo-fan~(2), YANG Feng~(1), LIANG Jun~(2)(1.School of Life Science and Technology,Dalian Fisheries Univ.,Dalian 116023,China;2.Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China)  
Two pedigrees of manila clam(Ruditapes philippinarum)were established on the basis of shell colors in 2004.The pedigrees were Zebra variety with zebra-like color patterns on the shell,and Liangdao Red with two bright red radioactive strips on shells.The shell length of D-larvae,larval growth,survival,metamorphosis and growth and survival at juvenile and grown-out stage were compared for the different manila clam pedigree.The results show that the differences of shell lengths of D-larvae between the Zebra pedigree breed and Liangdao Red pedigree breed and between Liangdao Red pedigree breed and control group were significant.However,no evident difference of shell lengths of D-larvae between the Zebra pedigree breed and control group were found.The shell lengths of Zebra pedigree and Liangdao Red pedigree were larger than that of control group at days 4 and 7.The differences of survival at day 4 among all groups were not significant.The differences of the metamorphosis among all groups were significant.The shell lengths of the Zebra pedigree breed at days 24 and 66 were larger than those of Liangdao Red pedigree and control group.The significant difference of shell length between Zebra and Liangdao Red pedigree was not observed.At day 135,the shell length of Liangdao Red pedigree breed was significantly larger than that of Zebra pedigree and the shell length of Zebra pedigree breed was significantly larger than that of the control group.The survivals in both nursing and grown-out stage were ranged in a descendant order as the following: zebra group control group Liangdao Red group.At day 393,the shell length of Liangdao Red pedigree was significantly larger than those of Zebra pedigree breed and control group.
【Fund】: 辽宁省科技攻关项目(2003203001);; 中国科学院知识创新工程项目(ZKCX2-211);; 国家“863”资助项目(2004AA603310)
【CateGory Index】: S968.3
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
【References】
Chinese Journal Full-text Database 10 Hits
1 ZHANG Yue-huan 1,YAN Xi-wu 1,ZHANG Peng2,JIN Jing-yu1,YANG Feng1,ZHANG Guo-fan3(1.Institute of Life Science and Technology,Dalian Fisheries University,Dalian 116023,China;2.Pulandian Fisheries Technique Extension Station,Dalian 116222,China;3.Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China);Research Advances and Prospects on Shell Color Polymorphism of Mollusks[J];Fisheries Science;2008-12
2 ZHANG Yue-huan1,YAN Xi-wu1,HUO Zhong-ming1,YANG Feng1,ZHANG Guo-fan2(1.School of Life Science and Technology,Dalian Fisheries Univ.,Dalian 116023,China;2.Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China);Growth and development in different geographical populations of Manila clam Ruditapes philippinarum[J];Journal of Dalian Fisheries University;2009-01
3 DING Jian-feng1,2,YANG Fei1,2,YAN Xi-wu1,2,YANG Feng1,2,ZHAO Li-qiang1,2,ZHANG Guo-fan3(1.College of Fisheries and Life Science,Dalian Ocean University,Dalian 116023,China;2.Engineering Research Center of Shellfish Culture and Breeding in Liaoning Province,Dalian 116023,China;3.Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China);Comparison of the immune defense functions in Manila clam Ruditapes philippinarum with different shell colors[J];Journal of Dalian Ocean University;2012-05
4 DING Jian-feng,WANG Rui,YAN Xi-wu,ZHAO Li-qiang,YANG Feng,WANG Lian-shun(Engineering Research Center of Shellfish Culture and Breeding in Liaoning Province,College of Fisheries and Life Science,Dalian Ocean University,Dalian 116023,China);Comparative tolerance to low salinity stress in Manila clam Ruditapes philippinarum with three shell colors[J];Journal of Dalian Ocean University;2013-03
5 WANG Xue-ying,GAO Yuan-zhen,DU Xiao-dong,DENG Yue-wen,LU Jing(Fisheries College of Guangdong Ocean University,Zhanjiang 524001,China);Genetic structure of the third generation yellow colored line and base stock of pearl oyster Pinctada martensii as revealed by SSR marker system[J];Marine Science Bulletin;2012-03
6 LIU Zhi-Gang1, 2, ZHU Xiao-Wen1, 2, WANG Hui1, 2, WANG Wei3 (1. Fisheries College of Guangdong Ocean University, Zhanjiang, 524025; 2. Guangdong Higher Educational Institution Tropical Marine Invertebrates Culture Engineering Research Center, Zhanjiang, 524025; 3. Zhanjiang Silverwave Marine Biotechnology Co. Ltd., Zhanjiang, 524025);RESEARCH ON THE INHERITANCE OF SHELL COLOR IN CHLAMYS NOBILIS[J];Oceanologia et Limnologia Sinica;2012-01
7 LIU Zhi-Gang 1,2,WANG Hui 1,2,Lü Wen-Gang 1,ZHU Xiao-Wen 1,2,LIU Jin-Shang 3(1.Guangdong Ocean University,Zhanjiang,524025;2.Guangdong Higher Educational Institution Tropical Marine Invertebrates Culture Engineering Research Center,Zhanjiang,524025;3.Zhanjiang Silverwave Marine Biotechnology Co.Ltd.,Zhanjiang,524025);INHERITANCE OF SHELL COLOR AND ADDUCTOR MUSCLE COLOR IN CHLAMYS NOBILIS[J];Oceanologia et Limnologia Sinica;2012-02
8 GUO Wen-Xue 1,YAN Xi-Wu 1,MA Gui-Fan 1,XIAO Lu-Yang 1,ZHANG Guo-Fan 2(1.College of Fisheries and Life Science,Dalian Ocean University,Dalian,116023;2.Institute of Oceanology,Chinese Academy of Sciences,Qingdao,266071);A PRELIMINARY STUDY ON PEDIGREE SELECTION OF MACTRA VENERIFORMIS WITH TWO INNER-SHELL COLORS[J];Oceanologia et Limnologia Sinica;2012-02
9 ZHANG Yue-huan1 YAN Xi-wu1 WANG Yan1 HUO Zhong-ming1YANG Feng1 ZHANG Guo-fan2 TENG Li-ping3 YANG Tan-guang3(1 Institute of Life Science and Technology,Dalian Fisheries University,116023)(2 Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071)(3 Dalian Laohutan Ocean Park,116013);Establishment of hybrid families of Manila clam Ruditapes philippinarum with different shell shapes and comparison of their early stage development[J];Progress in Fishery Sciences;2009-02
10 ZHANG Yuehuan1,YAN Xiwu1,YAO Tuo1,HUO Zhongming1,YANG Feng1,ZHANG Guofan2(1. The Institute of Life Science and Technology, Dalian Fisheries University, Dalian 116023, China;2. Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China);Study on population hybridization of two shell color strains of Manila clam Ruditapes philippinarum[J];South China Fisheries Science;2008-03
【Citations】
Chinese Journal Full-text Database 2 Hits
1 ZHENG Huai Ping , ZHANG Guo Fan, LIU Xiao, QUE Hua Yong  (Institute of Oceanology,The Chinese Academy of Sciences, Qingdao, 266071; Graduate School,The Chinese Academy of Sciences,Beijing,100039) (Institute of Oceanology,The Chinese Academy of Sciences,Qingdao,266071);ESTABLISHMENT OF DIFFERENT SHELL COLOR LINES OF BAY SCALLOP ARGOPECTEN IRRADIANS IRRADIANS LAMARCK(1819) AND THEIR DEVELOPMENT[J];Oceanologia Et Limnologia Sinica;2003-06
2 Liu Renyan Zhang Xichang Ma Chengdong Liang Yubo (National Marine Environmental Monitoring Center, Dalian, 116023);Study on the correlation between morphological characters and genetic variation of R.philippinarum[J];MARINE ENVIRONMENTAL SCIENCE;1999-02
【Co-citations】
Chinese Journal Full-text Database 10 Hits
1 SUN Xiu-Jun et al(Shanghai Fisheries University,College of Life Science and Technology,Shanghai 2000902);Comparative Analysis of Morphological Indices of Papanese Scallops with 2 Shell Colors[J];Journal of Anhui Agricultural Sciences;2008-23
2 CHEN Dan-qun et al(Fisheries College,Huazhong Agricultural University,Wuhan,Hubei 430070);Establishment of Pinctada fucata Families and Comparison of Their Growth Traits[J];Journal of Anhui Agricultural Sciences;2008-35
3 YANG feng1,ZHANG Yue-huan1,ZHAO Yue1,YAN Xi-wu1,LI Zhi-gang2,ZHANG Guo-fan3(1.College of Life Science and Technology,Dalian Fisheries University,Dalian 116023,China;2.Dandong Fishery Technical Extension Station,Dandong 118002,China;3.Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China);The Establishment of Families of Gmelin Cyclina sinensis and Its Early Development[J];Fisheries Science;2008-08
4 ZHANG Yue-huan 1,YAN Xi-wu 1,ZHANG Peng2,JIN Jing-yu1,YANG Feng1,ZHANG Guo-fan3(1.Institute of Life Science and Technology,Dalian Fisheries University,Dalian 116023,China;2.Pulandian Fisheries Technique Extension Station,Dalian 116222,China;3.Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China);Research Advances and Prospects on Shell Color Polymorphism of Mollusks[J];Fisheries Science;2008-12
5 ZHANG Yue-huan1,YAN Xi-wu1,HUO Zhong-ming1,YANG Feng1,ZHANG Guo-fan2(1.School of Life Science and Technology,Dalian Fisheries Univ.,Dalian 116023,China;2.Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China);Growth and development in different geographical populations of Manila clam Ruditapes philippinarum[J];Journal of Dalian Fisheries University;2009-01
6 ZHAO Peng,DING Jun,CHANG Ya-qing(Key Laboratory of Mariculture,Agriculture Ministry,PRC,Dalian Ocean University,Dalian 116023,China);Effect of shell size characters on live body weight in Japanese scallop Mizuhopecten yessoensis with two colors[J];Journal of Dalian Ocean University;2011-01
7 QIU Yang-yang~1,LU Hai-yan~2,MI Hua-ming~3,CHENG Xi~2,LI Ying-sen~1,LI Jia-le~1 (1.College of Fisheries and Life Science,Shanghai Ocean University,Shanghai 201306,China;2.Jiading Fisheries Technology Extension Station, Shanghai 201800,China;3.Shanghai Wanjin Beauty Fish Farm,Shanghai 201808,China);Comparison of pigmentation and morphology in goldfish with tiger-type head or butterfly-type tail and their hybrids[J];Journal of Dalian Ocean University;2011-03
8 LIU Da-bo,NIU Dong-hong,JIANG Zhi-yong,LI Jia-le(Key and Open Laboratory of Aquatic Genetic Resources and Aquacultural Ecosystem Certificated by the Ministry of Agriculture,College of Fisheries and Life Science,Shanghai Ocean University,Shanghai 201306,China);Morphological variations and discriminant analysis of seven populations of sinonovacula constricta[J];Marine Fisheries;2009-04
9 GUAN Yunyan1,2,HE Maoxian1 (1.South China Sea Institute of Oceanology,Chinese Academy of Sciences,LMB,LAMB,Guangzhou 510301,Guangdong,China; 2.Graduate school,Chinese Academy of Sciences,Beijing 100039,China);Progress on Shell Coloration Polymorphism in Seashells[J];Marine Science Bulletin;2009-01
10 WANG Xue-ying,GAO Yuan-zhen,DU Xiao-dong,DENG Yue-wen,LU Jing(Fisheries College of Guangdong Ocean University,Zhanjiang 524001,China);Genetic structure of the third generation yellow colored line and base stock of pearl oyster Pinctada martensii as revealed by SSR marker system[J];Marine Science Bulletin;2012-03
【Co-references】
Chinese Journal Full-text Database 10 Hits
1 SUN Xiu-Jun et al(Shanghai Fisheries University,College of Life Science and Technology,Shanghai 2000902);Comparative Analysis of Morphological Indices of Papanese Scallops with 2 Shell Colors[J];Journal of Anhui Agricultural Sciences;2008-23
2 CHEN Dan-qun et al(Fisheries College,Huazhong Agricultural University,Wuhan,Hubei 430070);Establishment of Pinctada fucata Families and Comparison of Their Growth Traits[J];Journal of Anhui Agricultural Sciences;2008-35
3 WANG Yu et al(Tropical Fisheries Research and Development Center,South China Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences,Sanya,Hainan 572018);Path Analysis on the Morphological and Weight Characters of Wild Amusium pleuronectes in Hainan[J];Journal of Anhui Agricultural Sciences;2009-08
4 LI Xiao-ning et al(South China Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences,Guangzhou,Guangdong 510300);Isolation and Screening of Microsatellite DNA Markers from Pinctada fucata[J];Journal of Anhui Agricultural Sciences;2009-15
5 OUANG TE-YIO, LIU HAN-YIN (Universite d'Amoy);LES RECHERCHES PRELIMINAIRES SUR LE CROISEMENT DES HUITRES[J];Acta Zoologica Sinica;1959-03
6 YANG Hui -Ping ① LI Li ① GUO Xi-Ming ①② (①Experimental Marine Biology Laboratory,Institute of Oceanology, The Chinese Academy of Sciences, Qingdao*"266071,Shandong,China) (②Haskin Shellfish Research Laboratory,Institute of Marine and Coa;PRELIMINARY STUDY ON INDUCING POLYPLOID IN JAPANESE SCALLOP (PATINOPECTEN YESSOENSIS) BY CYTOCHALASIN B[J];Acta Zoologica Sinica;2001-04
7 ZHANG Wei-Zhu 1,4 , WU Xin-Zhong 2 , WANG Ming 3 1. Department of Chemistry and Biology, Chuzhou University, Chuzhou 23900, Anhui, China 2. College of Animal Sciences, Zhejiang University, Hangzhou 310029, China 3. College of Veterinary Medicine, China Agricultural University, Beijing 100094, China 4. South China Sea Institute of Oceanology, the Chinese Academy of Sciences, Guangzhou 510301, China;Surface and ultrastructural characterization of the haemocytes in the scallop Argopecten irradians[J];Acta Zoologica Sinica;2005-03
8 George A. EVSEEV ** , Olga Ya. SEMENIKHINA, Natalya K. KOLOTUKHINAInstitute of Marine Biology, Far East Branch of Russian Academy of Sciences, Vladivostok 690041, Russia;Early stage morphogenesis: an approach to problems of taxonomy, phylogeny and evolution in the Mytilidae (Mollusca: Bivalvia)[J];Acta Zoologica Sinica;2005-06
9 ZHAO Ying-Ying 1,2, ZHU Xiao-Chen2, SUN Xiao-Wen 1**, LIANG Li-Qun1,SUN Yang2, LIU Dan21.Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin 150070,China2.Life Science and Technology Institute, Dalian Fisheries University, Dalian 116023, Liaoning, China;Polymorphic microsatellite loci of the Japanese scallop Patinopecten yessoensis[J];Acta Zoologica Sinica;2006-01
10 JIANG Yong-Hua,YAN Su-Fen The Key Laboratory of Science and Technology for Aquaculture and Food Safety,Fisheries College,Jimei University,Xiamen 361021,Fujian,China;Effects of pH on the activities of digestive enzymes in Panulirus stimpsoni[J];Acta Zoologica Sinica;2008-02
China Proceedings of conference Full-text Database 1 Hits
1 KONG Xiaoyu, LIU Yajun, YU Ziniu, SONG Linsheng(1. The Key Laboratory of Mariculture, Ministry of Education, Ocean Unviersity of Qingdao, Qingdao 266003, China 2. Institute of Oceanology, Academy of sciences, Qingdao 266071);Comparative study of mitochondrial 16S rRNA gene fragments of Scallop Chlamys farreri and Argopecten irradians[A];CHINESE SOCIETY FOR OCEANOLOGY AND LIMNOLOGY (缩写CSOL)[C];1999
【Secondary References】
Chinese Journal Full-text Database 10 Hits
1 ZHANG Tao et al(College of Life Science,Ludong University,Yantai,Shandong 264025);The Establishment and Optimization of AFLP Molecular Marker Reaction System for Solen grandis[J];Journal of Anhui Agricultural Sciences;2011-29
2 BI Xiao-xin et al (College of Life Sciences,Ludong University,Yantai,Shandong 264025);Analysis on Genetic Diversity of Mitochondria from Venerupis philippinarum in the Coasts of Yantai and Weihai[J];Journal of Anhui Agricultural Sciences;2012-02
3 ZHANG Gen-Fang①② XU Shi-Jian②③ FANG Ai-Ping②③(① Jinhua College of Vocation and Technology,Jinhua 321007;② Jinhua Jewel Pearl Institute,Jinhua 321017;③ Jinhua Wellwant New Aquaculture Tech.Co.,Ltd.,Jinhua 321017,China);Development and Growth of Juvenile Lamprotula leai[J];Chinese Journal of Zoology;2010-05
4 LI Jun-hui,WANG Qing-heng,DU Xiao-dong,ZHANG Shan-fa (Fishery College,Guangdong Ocean University,Zhanjiang 524025,China);Effects of Temperature and pH on Digestive Enzyme Activities in Hepatopancreas of Pearl Oyster Pinctada martensii[J];Fisheries Science;2011-02
5 JIANG Zhiqiang,SHI Hongyue,CUI Pei,TIAN Qingjie,ZHANG Yuanzhen,ZHANG Zhiming(Key Laboratory of Mariculture,Ministry of Agriculture,Dalian Ocean University,Dalian,116023,China);Effect of dietary protein levels on body pigmentation,growth and immunology of ornmmental carp(Cyprinus carpio L.)[J];Journal of Northeast Agricultural University;2012-03
6 LI Jun-hui,LIU Hong-li,DU Xiao-dong,WANG Qing-heng(Fishery College,Guangdong Ocean University,Zhanjiang 524025,China);Effects of salinity and the body size on the oxygen consumption and ammonia excretion rates of Paphia undulate[J];Journal of Marine Sciences;2011-04
7 ZHANG Yue-huan1,YAN Xi-wu1,HUO Zhong-ming1,YANG Feng1,ZHANG Guo-fan2(1.School of Life Science and Technology,Dalian Fisheries Univ.,Dalian 116023,China;2.Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China);Growth and development in different geographical populations of Manila clam Ruditapes philippinarum[J];Journal of Dalian Fisheries University;2009-01
8 Dai Yue 1 Yu Ziniu 2 Zhao Xiaoxia 1 Wang Qingheng 1 Du Xiaodong 1 Wu Yanzhong 1 1 Fisherise College,Guangdong Ocean University,Zhanjiang,524001; 2 Key Laboratory of Marine Bioresourses Sustainable Utilization,South China Sea Institute of Oceanlogy,Chinese Academy of Sciences,Guangzhou,510301;Genetic Structure of F_1 among Four Shell Color Selective Lines of Pearl Oyster Pinctada martensii Based on AFLP Analysis[J];Genomics and Applied Biology;2010-02
9 WU Yang-Ping CHEN Ai-Hua YAO Guo-Xing ZHANG Zhi-Wei ZHAGNG Cao-Jin ZHANG Yu Jiangsu Institute of Marine Fisheries,Nantong 226007,China;Basic Characteristics of Embryogenesis and Juvenile Development of Solen grandis[J];Chinese Journal of Zoology;2012-04
10 DING Jian-feng1,2,YANG Fei1,2,YAN Xi-wu1,2,YANG Feng1,2,ZHAO Li-qiang1,2,ZHANG Guo-fan3(1.College of Fisheries and Life Science,Dalian Ocean University,Dalian 116023,China;2.Engineering Research Center of Shellfish Culture and Breeding in Liaoning Province,Dalian 116023,China;3.Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China);Comparison of the immune defense functions in Manila clam Ruditapes philippinarum with different shell colors[J];Journal of Dalian Ocean University;2012-05
【Secondary Citations】
Chinese Journal Full-text Database 10 Hits
1 WHNG Wei 1,TANG Yu qing 2 (1 Dalian Shengxin Sea products Co. Ltd.Dalian 116620,China; 2.Fisheries Science Research Institute of Jinzhou,Dalian 116100,China);Trial on hybridized Chlamys farreri Culture[J];Fisheries Science;2003-02
2 Yan Xiwu (LiaoNing Marine Fisheries Research Institute,116023) Lü Bo (PanJin multiplication station of chinese mitten crab) Yang Weidong (DaLian Laohutan Park) Liu Changfa (DaLian Fisheries College,116023);The influence of effective chlorine on phytoplankton[J];FISHERIES SCIENCE;1998-05
3 YANG Feng,\ GAO Yue mian,\ SU Yan ming,\ CAO Shu xiang (Dept of Aquaculture, Dalian Fisheries Univ , Dalian 116023, China;);The study on the tolerance of bay scallop \%Argopecten iradians\% to pH and ammonia[J];JOURNAL OF DALIAN FISHERIES UNIVERSITY;1999-03
4 LI Xia 1 , WANG Jing-bo 1 , WANG Bin 1 , LIANG Yu-bo 2 (1.Dept. of Aquaculture, Dalian Fisheries Univ., Dalian 116023, China; 2. Institute of Marine Enviromental Protection,State Oceanic Administration,Dalian 11;Histopathological study on Perkinus sp. disease of Ruditapes philippinarum[J];Journal of Dalian Fisheries University;2002-03
5 Zhou Yibin \ \ Yin Chunxia \ \ Yang Jianli (Key Laboratory Of Maricultural Ecology, Ministry of Agriculture, PRC, Dalian, DFU);The Oxygen Consumption and NH 4 N Excretion of Ruditapes philippinaram in Relation to Response to Chronic Toxicity of Three Heavy Metals[J];JOURNAL OF DALIAN FISHERIES UNIVERSITY;1998-01
6 Chen Yuan Chen Chong Wang Xiaoyue Su Hesheng Sui Xilin(Marine Fisheries Research Institute, Dalian 116023);Technique for Artificial Seedrearing of Meretrix meretrix linnaeus in Farm[J];JOURNAL OF DALIAN FISHERIES UNIVERSITY;1998-02
7 Sun Zhenxing Wang Rucai Jiang Ming Liu Xiaoyun ( Ocean University of Qingdao , 266003) Xie Jialin ( Institute of Oceanology,the Chinese Academy of Sciences, Qingdao 266071);OBSERVATION ON THE PRECESS OF FERTILIZATION OF Haliotis discus hannai WITH TRANSMISSION ELECTRON MICROSCOPE[J];ZOOLOGICAL RESEARCH;1997-03
8 Li Taiwu, Sun Xiuqin *, Liu Yan ** , Li Chunmao *** , Guo Hao **** (Life Science and Technology School, Ningbo University, Ningbo 315211) ( First Institute of Oceanography, State Oceanic Administration, Qingdao 266003) ( **;Allozyme Variation of Two Subspecies of Chlamys farreri and Their Reciprocal Hybrids[J];High Technology Letters;2002-06
9 WU Hong-liu,WANG Hong-yong,WANG Jun (Department of Fisheries,Agricultural College of Hainan University, Haikou 570228, China);Developmental Stage of the Gonad of the Clam Paphia (Paratapes) undulata[J];Natural Science Journal of Hainan University;2002-01
10 Wang Xinyuan, Zhang Dehua, Ji Daorong Zhang Shaoqing (Shandong Marine Cultivation Institute);THE TOXIC EFFECT OF AMMONIA ON LARVAE AND JUVENILES OF OYSTER (CRASSOSTREA GIGAS T.)[J];Transaction of Oceanology and Limnology;1985-04
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved