End-to-end encryption and privacy controls.
Message and call for free* around the world.
Group conversations made simple.
Say it with stickers, voice, GIFs and more.
Reach your customers from anywhere.
http://www.srrsh.cuhk.edu.hk/zh/%E8%8A%B1%E5%9C%92%E5%B9%B3%E5%8F%B0