Do you have to be a party member to participate in party branch activities?

In principle, only party members who are active members of the branch (including those who submit applications for party membership to the branch), preliminary party members, and party members can participate in party branch activities. If they are not from the branch, these party members can attend as non-voting delegates. In fact, it is not very strict. Generally, if the organizer agrees to your participation, you can participate.