Biosysen Limited is an investment holding company engaged in accommodation operations and property facilities management services in the People's Republic of China. It also provides accommodation consultancy and management, and operates a healthcare and beauty business offering bioregenerative, collagen, and anti-aging skincare products. In addition, the company provides property facilities outsourcing management services, including professional cleaning, sterilisation, inventory supply management, and quality management, to third-party customers. Formerly known as Legend Strategy International Holdings Group Company Limited, it changed its name to Biosysen Limited in April 2026; it was founded in 2006 and is headquartered in Causeway Bay, Hong Kong.