Does WeChat Messenger need to buy envelopes to reply to messages?

No. WeChat Messenger Assistant does not require purchasing envelopes to reply to messages. WeChat Messenger Assistant can be understood as an automatic reply robot. When you send a question to it, it will automatically generate an answer based on your question. If you want to proactively send a message to WeChat Messenger Assistant, please enter "WeChat Messenger Assistant" or "Message Assistant" in the WeChat chat box, and then you can send a message to it. You don't need to use envelopes or other tools, just send text messages in WeChat to interact with it.