To upload a logo, click the Menu icon and select โManage Channel.โ In a new window, hit the Camera icon. The optimal dimension of the avatar on Telegram is 512px by 512px, and itโs recommended to use PNG format to deliver an unpixelated avatar. Telegram Android app: Open the chats list, click the menu icon and select โNew Channel.โ Those being doxxed include outgoing Chief Executive Carrie Lam Cheng Yuet-ngor, Chung and police assistant commissioner Joe Chan Tung, who heads police's cyber security and technology crime bureau.
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