" The eight-day exercise in Nanjing, China from Nov 2-9 will involve around 70 personnel each from the SAF and the PLA."
China Defense Blog
I can't tell who's who on such photos because
(a) I don't know those countries' uniforms
Singapore is at one gate between Indian and Pacific Ocean, so I suppose such cooperation between these countries should be of interest to people who pay attention to East Asian and Indian Ocean security affairs and geostrategy.