Sansha Yongle Dragon Hole of 300.89 meters in depth is now officially the deepest ocean blue hole in the world, China's National Marine Environmental Forecasting Center (NMEFC) announced Sunday https://t.co/JfJVTBKwQt pic.twitter.com/zIE0sXEyD6

— People's Daily app (@PeoplesDailyapp) January 22, 2019