Thank you for your reply，I understand what you mean，and I am very much in favor.
NodeBB has a good experience on the web side.
I prefer to know how to fix it because most people in my place prefer a client and they think it is convenient.😞
@Chad this plugin provides support for importing from xenforo. https://github.com/akhoury/nodebb-plugin-import
There is one catch with that plugin. You will have to install NodeBB v1.0.0... complete the import and then upgrade NodeBB to latest version.
Chats are integrated into NodeBB. No plugin required. Supports one-to-one and group chats.