On April 15, the company's technical consultant, Professor Li Yonghan (Professor of Dalian Fisheries Institute, famous master tutor), brought his wife to the company's R&D center and officially started this year's research work. Professor Li is a well-known plankton expert in China. He has devoted himself to the study of biological characteristics and artificial culture techniques of rotifers, copepods and cladocerans for many years. In view of the current production problems and the company's development strategy, Professor Li will focus on the high-density artificial culture technology of freshwater rotifers and cladocerans this year; the control and utilization of seawater copepods and the control of macrophytoplankton in rotifer culture with the use of technology.