Cant login, error code 1021

i work in China,but always play Asia/The Americas.since 10 days ago,i cant login the game,always show error code 1021.
i am not alone,many guys live in China cant login either.please help us,as we cant fix that and Connection Troubleshooting - Blizzard Support cant either

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Probably not helpful but error 1021 is very often related to SNMP and/or a “disk full” message. In that context, this likely would indicate the server you are connecting to is overburdened. Or the client is not using the protocol correctly, or, like many in PTR have indicated, the client (your D3 game) needs to be running as a 64-bit process.

Oh, and if you’re tying to connect to servers in China, it may just simply fail because, apparently, China is not supported.

already fix by using vpn,thank you for your reply

大家都这么解决1021错误代码的,我的好长时间了,重装系统,游戏,到网吧试,都不好用,求 大神帮助