微信

Weixin or WeChat (mobile text and voice messaging service developed by Tencent 騰訊|腾讯[Teng2 xun4])

surname Wei / ancient Chinese state near present day Chongqing / Taiwan pr. [Wei2]

tiny / miniature / slightly / profound / abtruse / to decline / one millionth part of / micro- / Taiwan pr. [wei2]

letter / mail / CL:封[feng1] / to trust / to believe / to profess faith in / truthful / confidence / trust / at will / at random