Activate up to 20 bots A vandalised bank during the 2019 protest. File photo: May James/HKFP. 2How to set up a Telegram channel? (A step-by-step tutorial) Step-by-step tutorial on desktop: 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.
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