How to save the codes in GBK encoding by default in R2020b?

I wrote some codes in R2020b. Turns out they are all UTF-8 encoding.

UTF-8 is good, but I need to run my codes in older verson in which the UTF-8 characters are not right. I have to save the codes in GBK encoding one by one.

Is it possible to save to GBK encoding by default? I mean the code is saved in GBK encoding whenever you press Ctrl+S or click the save button.

I tried to modify the lcdata.xml file, but it seemed not work in R2020b version