https://www.gamespot.com/articles/new-pubg-map-sanhok-coming-to-pc-this-week-patch-n/1100-6459893/

A new update is on the way soon for the PC version of PlayerUnknown's Battlegrounds. Patch #15 is scheduled to arrive this Friday, June 22, and will introduce an assortment of UI and sound improvements to the game, as well as the tropical map, Sanhok.

Following several weeks of testing on PUBG's Experimental Server, Sanhok will officially roll out for the live game with Patch 15. The map's most distinctive feature is its size; unlike Erangel or Miramar, Sanhok is 4km x 4km, making it one-fourth as large as PUBG's previous two maps. Despite its smaller scale, it still hosts 100 players, meaning matches are much quicker and more intense when contested on Sanhok.