Dayan Cubes is a Chinese brand designed by Daqing Bao. DaYan is the pinyin of his name "大烟头" (Da Yan Tou).
The logo on Dayan cube uses the last character "头".
DaYan TengYun 3x3x3 MAGNETIC SPEED CUBE
DaYan TengYun M 2x2x2 MAGNETIC SPEED CUBE
Parts: Core for DaYan Zhanchi 3x3
Parts: Center Cap for DaYan ZhanChi 3x3 WHITE