Twitter does a lot to de-anonymize people - like locking accounts until a phone number with a real name attached is provided. Then it also conplies with locally “legal” requests for user info. So any anonymity at Twitter is temporary & fragile.
And efficient states will often engage in the ‘minimum viable persecution’ to satisfy their goals. Not every agency may have deanonymized the account, not all may care about foreign-language coverage, and those that do may have considered the deletion of the account, while it was generally pseudonymous, a sufficient message.
But further complaints under a ‘real name’ – allowing further Chinese-language secondary coverage & fully de-anonymizing the account to the public – could easily draw further enforcement, from the same or other agencies.