China Construction Bank

Sources: at least nine state-run Chinese firms, including China Mobile, tell staff to limit use of Tencent's domestic chat app Weixin, citing security concerns

Employees were told to disband chat groups over security concerns, as Beijing's scrutiny into Tencent grows Tweets: @jchengwsj Tweets: Jonathan Cheng / @jchengwsj : Managers at some Chinese state-run ...