Hunan Sroad Technology Co., Ltd. is a high-tech company led by professors and talents. The company was established in line with the national innovation drive strategy, focusing on research and development and production of high-performance sports bicycle shifting kits. The company's development goal is to be China's own internationally competitive competitive sports bike shifting kit brand. In order to ensure the research and development capability and product quality, the company invested a large amount of money to build a fully digital sports bicycle shifting kit testing center, which can realize the all-round systematic testing of the shifting parts such as the chain extractor, the crankset and the flywheel. It is the first professional in China. The shifting kit detects the platform.