Tianjin Development Holdings Limited, through its subsidiaries, supplies water, heat, thermal power, and electricity to industrial, commercial, and residential customers in the People's Republic of China. It operates through six segments: Utilities, Pharmaceutical, Hotel, Electrical and Mechanical, Port Services, and Elevators and Escalators. The company has an installed transmission capacity of approximately 996,000 kVA; daily water supply capacity of 325,000 tonnes; and steam transmission pipelines of approximately 549 kilometres, approximately 120 processing stations, and daily distribution capacity of approximately 30,000 tonnes of steam. It also provides services for construction of electricity supply network, application of technology related to new energy and renewable energy, and electricity construction and related technical services; energy storage technology services; and installation and maintenance of water pipes, and technical consultancy, as well as engages in the retail and wholesale of water pipes and related parts. In addition, the company is involved in the provision of water testing services; and manufacture and sale of hydroelectric equipment, and large scale pump units. Further, it operates Courtyard Hotel by Marriott Hong Kong; manufactures and sells chemical drugs, proprietary Chinese medicines, and other healthcare products; designs, manufactures, and prints pharmaceutical packaging products; and researches and develops medicine technology and products. Additionally, the company sells other paper-based packaging materials; manufactures and sells elevators and escalators; and operates finance leasing business. The company was incorporated in 1997 and is based in Central, Hong Kong. Tianjin Development Holdings Limited is a subsidiary of Tsinlien Group Company Limited.