A vandalised bank during the 2019 protest. File photo: May James/HKFP. Add up to 50 administrators Invite up to 200 users from your contacts to join your channel 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. End-to-end encryption is an important feature in messaging, as it's the first step in protecting users from surveillance.
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