Tianjin Cosbike Electric Bicycle Co., Ltd. is a joint venture specially specializing in the production of electric bikes and high quality bikes. Our company has our coordinated process system including R&D, manufacture, sale and service. Our folding bikes are made of magnesium-aluminum alloy and our folding electric bikes are made of magnesium-aluminum alloy. The lithium batteries independently researched and manufactured by our company have been well evaluated by domestic and foreign customers. Especially, the life of our iron-lithium battery is 5 years, with 3 years warranty. As a result the average cost of our battery is lower than that of the lead acid battery by 35% , guaranteeing our products of high cost performance. Our products are safe, environmentally friendly, economical, utility, beautiful and elegant. With sports and leisure feature, they are transportation tools preferentially