The Chinese army will hold naval exercises in the Hainan area on April 21-23

The Navy of the People's Liberation Army of China (PLA) will conduct exercises on April 21-23 in the area of the southern Chinese province of Hainan.

This is stated in a message posted on Thursday on the website of the Maritime Affairs Administration of the People's Republic of China.
The brief notification indicates the coordinates of the maneuver areas in which a temporary ban on navigation is imposed. The exercises will begin on April 21 at 18:00 local time (13:00 Moscow time) and will end at 08:00 (03:00 Moscow time) on April 23.
It is not specified what forces and means will be involved in them, writes TASS.