Founded by Legend Star, Legend Star Union (LSU) is a community composed of alumni from the Entrepreneur CEO Training Program and Legend Star portfolio companies (referred to as "Star Members"), with over 1,300 member enterprises.

LSU provides a platform for learning exchange, problem-solving, resource sharing, and mutual success. It has launched various entrepreneurial services and programs including Star Fund, Star Carnival, Innovation Tour, Star Sharing Sessions, Star Board Meetings, and Star Forum. As of now, LSU has 61 Star Member companies launched Chinese or overseas IPOs, 185 national-level “National specialized, high-end and innovation-driven Little Giant Enterprise”‌‌.347 member firms had a valuation of more than USD100 million, and Star Friends combined raised more than RMB430 billion, had an enterprise value of over RMB1,60billion and created more than 450,000 jobs.

LSU has become one of China's most cohesive, dynamic, and influential entrepreneurial ecosystems.