[1/2] WeChat app is seen on a smartphone in this illustration taken, July 13, 2021. REUTERS/Dado Ruvic/Illustration/File Photo Summary Summary Companies Importance of Channels communicated within Tencent – sources Total views on Channels surged over 200% last year – Tencent Will be tough for Channels to become as big as Douyin -analysts HONG KONG, Jan 13 (Reuters) – On a hot summer's day last year, the 90's boy band Backstreet Boys clambered on to a stage in Pennsylvania and belted out hits as 44 million viewers tuned in from thousands of miles away for the online concert hosted by China's…