As Tech in Asia reported last week, China Unicom’s WeChat subscription plan was launched only a month ago and already has 1 million subscribers. The service provides a dedicated SIM card that allows users to access WeChat (Weixin) via the mobile web even if the user does not have a full 3G subscription with China Mobile. This shows the incredible strength of Tencent’s mobile chat app that is taking China and increasingly other parts of the world by storm.