As a large private science and technology enterprise subordinated to Tongwei, Yongxiang Co., Ltd. has carried out independent innovation in the field of cold hydrogenation, comproportionation, large energy-saving distillation, high-efficiency restoration, exhaust recovery, automatic control of electrical appliances, comprehensive gradient utilization of thermal energy, closed cycle of chlorine and hydrogen elements, and has built a circular economy industrial chain where new energy and chemical industry are fully integrated.

After technological upgrading for four times, the “Yongxiang Method” developed originally by Yongxiang Co., Ltd. has raised the purity of high-purity crystalline silicon to 99.999999999% (10 to 11 decimal places) and made a global leader when referring to production capacity.

Tongwei Solar, dedicated to the R&D, manufacturing and promotion of solar power core products, is the world's largest crystalline silicon cell manufacturer, which now boasts five bases respectively in Shuangliu, Meishan, Jintang, Tonghe and Pengshan. At present, Tongwei Solar's cells feature with a first-class quality in the industry, the industry-leading cost, and various world-class technical indicators. It has been made into the world's largest crystalline silicon solar cell manufacturer with the most advanced PV technology in the industry and production equipment, the highest level of automation and intelligentization. In addition, it has won awards like the national "Green Factory" and "National Five-Star Site". At present, Tongwei Solar's total production capacity of solar cell has exceeded 95GW, making it the largest production capacity in the world for 3 years in a row with the largest shipment and the strongest profitability. In the next 2-3 years, Tongwei Solar's total production capacity of solar cell will reach 130-150GW, further consolidating its leading position in the industry worldwide.