According to the salmon. s ( Oncorhynchus) biological character of return to its hatching river, adopt ing the method of transplant and releasing, 9 839 000 eyed eggs of the salmon were introduced ( Oncorhynchus keta, O. gorbuscha, O. kisutch, O. masou) from Japan, total 8 409 000 juvenile f ish was hatched and cultivated for 11 years running from 1985 to 1996. total 127 returning and mature salmons were collected from 1987 to 1995. It proved that the salmon could exist in the Yellow Sea area and return to its releasing river.