QQ tricks with many techniques (classic technology)

Methods with higher success rate for uploading custom avatars on QQ: (1). Crop the image to 40*40, any larger image will be reduced to this size.. (2). Convert the image to bmp format (3). After meeting the above conditions, I haven't received any upload failure notifications, succeeding every time (4). Avoid internet peak hours, it will be fine as long as you upload during these times. You can change your avatar anytime.