Chinese President Xi Jinping, also general secretary of the Communist Party of China Central Committee and chairman of the Central Military Commission, visits a seed laboratory to learn about seed industry innovation in Sanya, south China's Hainan Province, April 10, 2022. Xi on Sunday inspected the city of Sanya, south China's Hainan Province. (Xinhua/Li Xueren)

Xi Jinping, general secretary of the Communist Party of China Central Committee, on Sunday inspected the city of Sanya, south China's Hainan Province.

During the inspection, Xi visited a seed laboratory to learn about seed industry innovation, and a research institute of the Ocean University of China to learn about the development of marine science and technology.

Chinese President Xi Jinping, also general secretary of the Communist Party of China Central Committee and chairman of the Central Military Commission, visits a seed laboratory to learn about seed industry innovation in Sanya, south China's Hainan Province, April 10, 2022. Xi on Sunday inspected the city of Sanya, south China's Hainan Province. (Xinhua/Li Xueren)

Chinese President Xi Jinping, also general secretary of the Communist Party of China Central Committee and chairman of the Central Military Commission, visits a seed laboratory to learn about seed industry innovation in Sanya, south China's Hainan Province, April 10, 2022. Xi on Sunday inspected the city of Sanya, south China's Hainan Province. (Xinhua/Xie Huanchi)

Chinese President Xi Jinping, also general secretary of the Communist Party of China Central Committee and chairman of the Central Military Commission, talks to researchers while visiting a seed laboratory to learn about seed industry innovation in Sanya, south China's Hainan Province, April 10, 2022. Xi on Sunday inspected the city of Sanya, south China's Hainan Province. (Xinhua/Xie Huanchi)

Chinese President Xi Jinping, also general secretary of the Communist Party of China Central Committee and chairman of the Central Military Commission, visits a research institute of the Ocean University of China to learn about the development of marine science and technology in Sanya, south China's Hainan Province, April 10, 2022. Xi on Sunday inspected the city of Sanya, south China's Hainan Province. (Xinhua/Yan Yan)