The SUCK Channel on Telegram, with a message saying some content has been removed by the police. Photo: Telegram screenshot. 4How to customize a Telegram channel? A vandalised bank during the 2019 protest. File photo: May James/HKFP. Administrators 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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