Taobao sends a message to a customer service. Can another person see it?

Yes, you can. Changing customer service on Taobao means that different customers use the same chat channel to help solve the problem. You can see the chat record to understand the problem. If it is other information, such as how long this account has been registered, it will be lost. I can only see each other's head and screen name, as well as your chat content.