上海通告课堂 is a public Telegram group — anyone can join without invitation. Your phone number is never visible to other members unless you've made it public in your Telegram privacy settings. You can leave at any time with a single tap. With 1,500 members, it is an established community.

No. Telegram never notifies your contacts when you join or leave a group. Other members inside 上海通告课堂 can see your username only if you post — your membership is not visible to anyone outside the group.

We verify every listing is publicly accessible, has a minimum member count, and exclude groups Telegram has marked as harmful. 上海通告课堂 currently has 1,500 members. If you've joined 上海通告课堂 and noticed something suspicious — a review on this page helps others stay safe.