If a person has left a channel 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.
194
若成员曾离开频道，您需要成为其好友才能将其加回。
只要其不在封禁列表中，该成员仍可通过邀请链接加入。
51/194