Yongxiang, a subsidiary of Tongwei, has been devoted to bolstering scientific research, improving advanced management levels, optimizing technical indicators, reducing production costs, and enhancing independent innovation capabilities. Thanks to those efforts, in 2013, it became one of the first companies that met the Standard Conditions for the Photovoltaic Manufacturing Industry approved by the Ministry of Industry and Information Technology.
With internationally-advanced technical talent teams and R&D strength, Yongxiang has established a polysilicon engineering technology research center, an enterprise technology center, a high-purity crystalline silicon preparation engineering laboratory, and a postdoctoral innovation practice base. As a leading player in the industry, it has many research achievements with independent intellectual property rights in core technology fields such as cold hydrogenation, anti-disproportionation, high-efficiency reduction, large-scale energy-saving distillation, tail gas recovery, thermal energy cascade recycling, and the closed-loop cycle of oxygen and hydrogen elements. The core technology of high-purity crystalline silicon has been iteratively upgraded to the “Yongxiang Method Gen 7” and the original "Reactive Distillation Method," with the N-type monocrystalline exceeding 90%, reaching the level of electronic-grade crystalline silicon.
By the end of 2021, Yongxiang had applied for 493 patents and obtained 342 authorized patents.