China Yunqian is an electronic contract service portal, which integrates trusted electronic contract signing and electronic contract verification. Any enterprise or individual can apply. The MMEC (Trusted Electronic Contract) conclusion system carried by the platform adopts many patented technologies, and it is the only electronic contract conclusion system that has passed the national acceptance. Jiangsu Trading Network E-commerce Co., Ltd. is the only one undertaking pilot and research and development, which meets the national standards of the Ministry of Industry and Information Technology and the Ministry of Commerce.