A set of mobile phone wallpapers of Cai Xukun's handsome photos in blue sweaters are shared with everyone. Wallpaper size: 1080x1920. Cai Xukun, born on August 2, 1998, is a male singer and actor in Mainland China.In the photo, Cai Xukun is wearing a blue knitted turtleneck sweater. His delicate face and handsome profile under the blue sky. Are you attracted by it?