"China's central bank reportedly has issued a document on March 18, April 15 asked to stop all Bitcoin transactions. So far the central bank noncommittal on the news." (Original text: 据传中国央行已在3月18日发文，要求4月15日前停止一切比特币交易。迄今央行对这一消息不置可否。)
http://live.sina.com.cn/zt/l/v/finance/globalnews1/

April 15 rings a bell.

Anyway, it's most likely FUD.
1) use of "reportedly"
2) says "the central bank [is] noncommittal on the news"

EDIT: Aaaand it's gone (news removed from sina.com.cn) https://twitter.com/ruima/status/446981681606447104