Ruan’s three brothers have a clear division of labor, and the eldest Ruan Rulong is responsible for defending against a sudden attack from the sea. The second Ruan Ruhu judges the possible nest according to the trace of aquatic plants and the third Ruan Rubao goes deep into the sea to disturb beavers according to Ruan Ruhu’s judgment and quick action.

Their brothers have cooperated with each other for many years and have rich experience. Every time they come…