A Hong Kong protester with a petrol bomb. File photo: Dylan Hollingsworth/HKFP. 3How to create a Telegram channel? Today, we will address Telegram channels and how to use them for maximum benefit. With Bitcoin down 30% in the past week, some crypto traders have taken to Telegram to “voice” their feelings. 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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