As a user of both, Line is a far superior app to Wechat. Besides the sticker fun, Line offers its own camera app to customize photos and has public events throughout Taiwan, Japan, and other SE Asian countries.

Wechat is really for text, group chat and way too much online selling/spam where too many people have turned their 'Moment's feed into portable ebays.

No one I know in Taiwan uses Wechat, and few people I know in ****** China use Line - but most people I know in Taiwan, HK, SG, MY use Line and have fun with it.

Truth be told, you need a VPN on both your phone and laptop before departing for ***** China to have any reasonable semblance of normal online activity, besides keeping the government from constantly monitoring everything you do.