2How to set up a Telegram channel? (A step-by-step tutorial) Unlimited number of subscribers per channel 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. The group also hosted discussions on committing arson, Judge Hui said, including setting roadblocks on fire, hurling petrol bombs at police stations and teaching people to make such weapons. The conversation linked to arson went on for two to three months, Hui said.
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