Can I check the passport number at the relevant institution before my passport comes down?

If you want to know something about yourself ... you can't find it in public resources.

If you want to inquire about China passport information, you can only go to the Exit-Entry Administration Section of the local public security bureau or the local immigration bureau or the provincial public security department!

Nothing can be found on the website! None of this information is public.

You have to contact the civil affairs department of the country you want to inquire about, and then you can inquire about personal information after a series of legal procedures.

Alternatively, it can be through Interpol.