Invite up to 200 users from your contacts to join your channel Image: Telegram. Developing social channels based on exchanging a single message isnโt exactly new, of course. Back in 2014, the โYoโ app was launched with the sole purpose of enabling users to send each other the greeting โYo.โ Administrators A Hong Kong protester with a petrol bomb. File photo: Dylan Hollingsworth/HKFP.
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