My friends, after a while, I finally found other NPCs and now there are more than 30 NPCs in my group. Actually there is no problem. I just needed to talk to many different NPCs in different places. Special thanks to both of you
Apart from that, is there any other addon where the bandits are not a single player but a group? Just like the zombie groups that attack periodically, Turkish bandit groups that will attack from time to time would be very good.