Hi, are you making sure that the Token isn't expired by the time you paste it? Normally, the Tokens have a 30-second time limit, so that could be the reason behind the issue.
We support Chinese in our app, you only have to change the language to Chinese in the settings. You can find the step-by-step tutorial on how to do it here: https://2fas.com/support/2fas-mobile-app/how-can-i-change-the-language-in-the-2fas-app/