A Hong Kong protester with a petrol bomb. File photo: Dylan Hollingsworth/HKFP. 6How to manage your Telegram channel? 5Telegram Channel avatar size/dimensions Invite up to 200 users from your contacts to join your channel Developing social channels based on exchanging a single message isn’t exactly new, of course. Back in 2014, the “Yo” app was launched with the sole purpose of enabling users to send each other the greeting “Yo.”
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