Can people in the WeChat group test group see each other?

Only the friends you choose can see it.

You can't see it if you don't choose mass sending.

Group sending method

Enter the wechat interface, click "I" to select "General" and then select "Function" and then select "Group Sending Assistant", click "New Group Sending", select "Start Group Sending" and then click "Select All", select "Next" (of course, you can also select some friends to send, and tick √ in front to go directly to the next step). Finally, just enter and send the information you need to send.