Hi Xu tao,
I have checked your project. You have not updated the appropriate Chinese Unicode values in Unicode settings. We have corrected the same in the updated project. Please see the attached project and it is working fine now. Kindly check your side and update.
You can get the Unicode for the Chinese character using the following tool
http://www.chinese-tools.com/tools/converter-unicode.html
In the project that you shared, you have used Alpha-numeric range as 0x0 - 0x7F. You can reduce the range to 0x31-0x7A since 256 Unicode can only be stored in RAM
Best Regards,
Jeyasudha.M