I like the fact that there are plenty of arseholes on wechat. The more there are the better for me.
I agree that the students are worried and it appears rightly so.
My approach is one of patience and not talking about sex. Works a treat.
Currently I'm at two extremes. Successfully banging a 49 year old chinese divorcee. Met once for coffee and then she was up for everything. She said she wasn't looking for fun, just chat. On the other extreme currently have had one date with a 18 year old student but she really wants shopping money more than my company.
Patience is the key I believe.