Great news for Lumia users in China!! Microsoft has started rolling-out Lumia Denim update for lots of devices in China. Here is what the translation from official source reads.
With immediate effect, Lumia 520/525/526/625/720/720T/1320 line users will receive Lumia Denim to push updates, unlocking new Lumia capabilities, upgrade the Windows Phone experience and anticipated minina 8.1! Default situation Xia, dang has available of system update Shi, phone automatically for tips; you also can manual check update: from application list, please click “set” > “phone update” > “check update”, and according to screen Shang of indicates to completed update; (* recommends in upgrade zhiqian backup phone in the of important information, and in Wi-Fi network Xia for update, in upgrade during, if phone again started times, is normal situation. ）