As a scuba enthusiast, American vlogger Matt Galat has gone scuba diving in many parts of the world. However, this time, he dived not for fun, but for corals off the coast of Sanya City, south China's Hainan Province. He took the deep plunge alongside a team of marine biologists to witness their fascinating work under the sea. 

How are corals grown in the ocean? Join Matt and find out!

Video editor: Shi Chan, Li Jiaming

Camera: Shi Chan, Zhao Yuxiang, Matt Galat

Cover photo designer: Chen Yuyang

Chief editor: Wang Mingyan

Executive producer: Wen Yaru

Supervisor: Shen Xiaomeng