Topjoy International Development Group Co.,Ltd was established in 2002 . We are located in HongKong & ShenZhen, China. We are engineers, designers, and industry veterans who passionately believe that better electric bikes make a better world. We have PinWheel self balanced Unicycle for you to choose，Small and portable short-distance walking robot, This gyro-stabilized electric unicycle is compact and fun for daily walking to office, cool plays and sports. Give you unprecedented fun and excitment!
TopJoy is a consumer-oriented and environmentally friendly transportation provider, committed to developing next-generation power-assist electric bikes and proprietary technologies. TopJoy ’s ideal has always been adopting the advanced technology incorporated with concepts of environmental protection and user’s behavior to develop innovative and high-quality products worldwide .