BEIJING, Dec. 29 (Xinhua) -- China on Monday released a survey report on the coral reef ecosystem of Huangyan Dao, which is located in Sansha City of the southernmost Hainan Province.

The survey report showed that the average coverage rate of hermatypic corals within the Huangyan Dao National Nature Reserve reaches 38.8 percent, and the coral reef ecosystem of Huangyan Dao is generally in good condition.