黄兴华回答:

　　soncrocodileissocalledthesoildragon,isonlyonecrocodileinChinatogrow.BEproduceinonlyoncedownstreaminYangtzeRivertake,originallyChinesethereisalsomoreoverakindofcrocodilenamelythegulfcrocodile,butdestroycompletelyalready,sothe扬soncrocodileseemtobeveryprecious,havingalreadybeenlistasoneclassprotectionanimal. 　　The扬soncrocodilebodygrows2metersorso,heavy30-40kilograms,thebacktakestheyellowspotandgrainforthedarkbrown,thebellyisagreycolor,alsoyellowandsmallspotwithhorizontal.Thecodahastheashblackandalternatewreath纹,itsarmsandlegsisthickshort,theactivityisn'tveryintelligentontheland,theswimminginwaterthenisverynimble,itstailbetheweaponoftheattackandself-defense. 　　The扬soncrocodileisakindofancientreptile,experiencingtheglacierweatherofthegeologyhistorywithbuildthemountainsporttowaitbigvarietybutluckilysurvivedown,atontheearthlive100,000,000yearsatleast.Becauseitstypeoffigure,structureandancientdinosaurnearto.Thereforebecalleddinosaurofactivateastone.Theagesrisesonthewhole,havingalreadybeenknow3,400.Thequantityofthe扬soncrocodilein50'sin20centuriesstillverymany,becauseofbeingcaughttokillingreatquantitiesbypeople,andthepopulationincrease,capturingthe扬soncrocodilefeatexistenceenvironment,causingthe扬soncrocodilereducequickly.The扬soncrocodilequantityisn'tenough500alreadycurrently,southshoreinYangtzeRiverthatislimitedbyJiangsu,Anhui.Forthesakeoftheprotection扬soncrocodile,Chinahasalreadybeenincludedinitnationalaclassprotectiontheanimallist,andbuiltupthe扬soncrocodiletobreedtheresearchcenterinAnhui,theaimwasmakethiskindofancientlivingcreatureforeverBeexistingontheearthunder.