Tianjin Development Holdings Limited supplies water, heat, thermal power, and electricity in China and Hong Kong through its subsidiaries. It operates in six segments: Utilities, Pharmaceutical, Hotel, Electrical and Mechanical, Port Services, and Elevators and Escalators. The company also manufactures and sells chemical drugs, Chinese medicines, and other healthcare products, and operates the Courtyard Hotel by Marriott Hong Kong. Incorporated in 1997 and based in Central, Hong Kong, it is a subsidiary of Tsinlien Group Company Limited.