It belongs to Lepidoptera of Salmonidae, and has a small mouth. The maxilla does not extend to the back edge of the eye. 1 species made in China. Cold-water fish inhabit the running water with low water temperature and clear water quality in mountain streams, and overwinter in deep pools or tributaries in winter. Females mature at 4-6 years old, and males mature earlier than females. In early spring, when it thaws, it will migrate upward to lay eggs. The spawning ground is generally located in the rapids below the deep pool (the bottom material is gravel and the water temperature is 8- 12℃). The eggs are precipitated, and the egg diameter is 3.7-4.2 mm. Carnivorous fish will also devour their eggs during the salmon breeding season. The meat is tender and the fat content is high, so it can be used as a new breeding object. Its natural resources have been exhausted.