Dear users :
Our new English version will be released from 20 to 24 o'clock on September 12th, 2016. During this period, the system will be unavailable. Sorry for the inconvenience.
The new English version is mainly to upgrade the interface, trying to make it easy and intuitionistic to use the system.
We hope you can gain a better expeience by using the new English version. And if you have any suggestions, please propose them on the column "Online Q&A". Thank you for your support.