Tongfang is a high-tech company controlled by Tsinghua University. Founded in June 1997, it is listed on Shanghai Stock Exchange with stock code 600 100. At that time, the stock name was "Tsinghua Tongfang". In 2005, Tsinghua Tongfang ranked 23rd in "Top 500 Electronic Information Enterprises in China". Tsinghua Tongfang has established four major industries, namely information technology, energy and environment, applied nuclear electronic technology and biomedicine, on the basis of independent core technology and fully combining capital operation ability. In the information industry, Tsinghua Tongfang is committed to applying technological innovation and product development in the fields of information system, computer system and digital TV system, and providing comprehensive solutions and complete sets of equipment for industries such as e-government, digital home, digital city, digital education and digital media. At present, Tsinghua Tongfang has leading technical strength and market share in the fields of computer products, informatization of major industries, digital educational resources and digital TV. In the energy and environment industry, Tsinghua Tongfang focuses on energy utilization and environmental pollution control projects and artificial environment projects based on core technologies such as flue gas desulfurization, garbage incineration, water treatment and air conditioning in business fields such as artificial environment, energy environment, building environment and water environment, and has obvious advantages in large and medium-sized air conditioning equipment. In the industrial application of nuclear electronic technology, a series of products with electron accelerator, radiation imaging, automatic control and digital image processing technology as the core have reached the international advanced level. In the fields of biomedicine and fine chemicals, it has become a new biomedical high-tech enterprise, producing new finished drugs, pharmaceutical intermediates, raw materials and other products.