the security mark is on the frame. According to the owner's guide, Xidesheng anti-counterfeiting QR code is on the frame, but it is not a QR code, it is the unique serial number of the car. So Xidesheng anti-counterfeiting QR code is on the frame. Shenzhen Xidesheng Bicycle Co., Ltd., founded in 1995, is a large bicycle and electric vehicle enterprise integrating design, development, production and sales. Its products won the title of famous brand in China, XDS trademark was awarded as a well-known trademark in China and a famous trademark in Guangdong Province, and the company won the honorary titles of outstanding private enterprise in Guangdong Province, high-tech enterprise in Shenzhen and leading private enterprise in Shenzhen.