The way to set the QQid to a blank id is simple
It only takes a few simple steps iu can complete the realization!
1. Create a new text document and open it
2. Position the cursor in the text document
3. Right mouse button --> Insert Unicode control character --> ZWJ
4. ctrl+A, select this invisible character
5. ctrl+C, Copy this invisible character
6. Open the nickname modification interface of your QQ, and clear all your nicknames
7. Ctrl+V, paste it to your nickname
8. After changing it, click OK