知了社保 is a free utility and tools application available on the iPhone platform. Developed by Zhiniao Chengdu Human Resources Service Co. Ltd., it aims to provide human resources outsourcing services to businesses and become the HR service department for millions of small and medium-sized enterprises.

With a team that has nearly 15 years of professional experience in human resources, 知了社保 combines a comprehensive service system, digital operation platform, and HR Saas tools to meet the diverse needs of businesses. The platform has been praised by customers for its "considerate, efficient, and secure" services.

Headquartered in Chengdu, known as the "Land of Abundance," 知了社保 currently operates in cities such as Beijing, Shanghai, Tianjin, Hangzhou, Nanjing, Xiamen, Shenzhen, Guangzhou, Chongqing, and Chengdu. The company has plans to expand its services to more cities in the future.