According to the photo about the training of Team B, the training roster of 2018 AVC Cup is:
S - Sun Hai-ping, Chen Xin-tong
OP - Wang Mei-yi, Chen Pei-yan
OH - Liu Yan-han, Duan Fang, Zhang Yi-chan, Ren Kai-yi
MB - Yang Zhou, Zheng Yi-xin, Gao Yi, Yang Han-yu
L - Meng Zi-xuan, Gong Mei-zi
In theory, Liu Yan-han, Ren Kai-yi and Zheng Yi-xin all could play the match as opposite hitters.
Zhu Yue-zhou (OP) is said to join Team B but not in the photo.