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/%E4%BA%AC%E5%B4%91%E8%97%9D%E8%A1%93%E8%A1%8C