If a person has left athe group in the past, you need to be in their Telegram contacts to add them back.
They can still join via an invite link as long as they are not on the Removed Users list.
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对不起，如果一个人退裙了，只有联系人才能把他拉回来（互相拥有电话号码）。
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ඞ丁二 τ2 🐈🥬🐛,
Jun 22, 2020 at 13:19