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.
樂器製造商的 商業趨勢: 高品質產品在外國生產, 大眾化產品在中國生產 http://www.tongtuning.com/wordpress/293