a bit of info from the Chinese press.

all 4 Olympic candidates from China will attend the Malaysian Open next week. the final list of 3 entries will be determined in 7/15. the Malaysian Open will be used to help gauge who will enter the Olympics. LiYB and coaching team do not have the final list, but Li stressed that ability and results vs. foreign players will be the most important factors.

other factors are seedings (ie. world ranking), that's one of the reason for sending almost all players to Malaysian Open as the points from the Malaysian Open will affect the seedings in the Olympics.