The two PLAN transports DAYUN class (Type 904) 883 DONGTINGHU and DANYAO class (Type 904A) 888 FUXIANHU ostensible operate as Fisheries Inspection ships ZHONGGUO YUZHENG 21 AND 88, repectively.
But this is mere camouflage, they are still PLAN ships, like the DAYUN class 884 JINGPOHU, operating to supply PLA garrisons on the Paracel (Xisha) and Spratley (Nansha) Islands.
The ship that has been converted into a hospital ship is QIONGSHA class (Nan Yun) 833, now Nan Yi 09, which is based at Guangzhou.