if you don’t, there are hotlines, or professionals, you can talk to. and then there’s always online forums.
如果你不想劳烦他们,你也可以打热线或者找专家聊,也可以去在线的网络论坛。
receiving clients can either log on periodically and check for new messages or set up a listener component that is always online awaiting new messages from the provider.