A Hong Kong protester with a petrol bomb. File photo: Dylan Hollingsworth/HKFP. 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. You can invite up to 200 people from your contacts to join your channel as the next step. Select the users you want to add and click “Invite.” You can skip this step altogether. Don’t publish new content at nighttime. Since not all users disable notifications for the night, you risk inadvertently disturbing them. The administrator of a telegram group, "Suck Channel," was sentenced to six years and six months in prison for seven counts of incitement yesterday.
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