LPD 999 is Jinggangshan, confirmed.

PLA
new dock landing ship conducts maiden maritime training

(Source: PLA Daily) 2012-02-07

　　Right after the Spring Festival of 2012, the newly commissioned “Jinggangshan” amphibious dock landing ship of a landing ship flotilla under the South China Sea Fleet of the Navy of the Chinese People’s Liberation Army (PLA) conducted the first-ever joint training with helicopters and air cushion