https://www.reuters.com/article/us-usa-wechat-trump-china/u-s-businesses-in-china-face-uncertainty-as-white-house-bans-wechat-idUSKCN25320Z >As Tencent assesses how its business might be impacted by a U.S. decision to ban its messenger app WeChat in the country, American companies in China may become unintended casualties due to their heavy reliance on the app, experts said.