1. Inquire about the archives of party member: The archives of activists who join the Party are generally kept in the Party organization where they join the Party, and you can contact the person in charge or staff of the Party organization for inquiry.
2. Ask about the community or unit: If the activists who join the Party determine their community or unit, they can directly consult the party organization of their community or unit.
3. Inquire about the transfer records of organizational relations: If activists who have joined the Party have ever transferred their organizational relations, they can inquire about the transfer records to find out which party branch they belong to.
4. Check the registration form of activists joining the party: this is the file kept by the party branch where the activists join the party, and usually records the basic information of the activists joining the party, including their units.
The above information is for reference only. If in doubt, please consult party member or the relevant person in charge of the Party organization.