This report targets main SNS service provider in China, QQ space(QQ空间)，RenRen(人人网)，Kaixin(开心网)，Douban(豆瓣网), Pengyou(朋友网), 51.com.
As same as Weibo, the peak time of access number is around from a.m.8:00 to p.m. 4:00 in each SNS services.
And around at p.m.6:00, access number particularly down. Probably it may be the time they get off their work and go home :-)
Nevertheless the best time promote on Chinese SNS is from a.m.8:00 to p.m. 4:00 as same as Weibo :-)
Original article => Enfodesk