china 3d tv test channel () was a chinese television channel which broadcast digital 3d television content from china central television, beijing television, tianjin television, shanghai media group, jiangsu television and shenzhen media group. it was launched on 1 january 2012 and was shut down on 30 july 2018, being replaced by cctv-4k, a television channel which broadcasts 4k content solely from cctv.