The YJ TianYuan puzzles are very interesting, the TianYuan 1 looks like the QiYi 02 cube at first glance but a half turn reveals a hidden edge which must be solved too, the TianYuan 2 had the edges more easily visible and the TianYuan 3 has a 2x2x2 around it making it somewhat like the Crazy 2x2x2. You can buy them here