The optimal dimension of the avatar on Telegram is 512px by 512px, and it’s recommended to use PNG format to deliver an unpixelated avatar. To delete a channel with over 1,000 subscribers, you need to contact user support The main design elements of your Telegram channel include a name, bio (brief description), and avatar. Your bio should be: A Hong Kong protester with a petrol bomb. File photo: Dylan Hollingsworth/HKFP.
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