Liang Dong Xu

Yuntianhua Group Co., Ltd. engages in the production of phosphate and compound fertilizer. Its business activities include production of glass fiber new materials, phosphate mining and phosphorus chemical production, petroleum industries, trade and manufacturing services, and industrial finance business. The company was founded on March 18, 1997 and is headquartered in Kunming, China.

Yunnan Tin Group (Holding) Co. Ltd. is a Chinese company that smelts, manufactures, and distributes tin, other non-ferrous metals, and minerals. The company is based in Gejiu, China and ultimately controlled by the Province of Yunnan. Wenxiang Gao has been the CEO of the company since 2008.

Shanghai University of Finance and Economics engages in the provision of educational services. It offers courses under the following school and departments: business, accountancy, finance, international business administration, economics, public economics and administration, humanities, law, information management and engineering, statistics, foreign languages, mathematics, international cultural exchange, professional and international education and continuing education. The company was founded in 1917 and is headquartered in Shanghai, China.

Yunnan Provincial Investment Holdings Group Co., Ltd. engages in the the provision of investment services and management of funds. Its investment involves energy, railway, finance, information, tourism, and medical health. The company was founded on September 5, 1997 and is headquartered in Kunming, China.

Yunnan Industrial Investment Holding Group Co., Ltd. provides industrial investment services. Its businesses include equity investment, financial investment, and asset management services. The company was founded on May 12, 2008 and is headquartered in Kunming, China.

Yunnan Olightek Opto-Electronic Technology Co., Ltd. engages in the research, design, production, and sale of organic light-emitting diode (OLED) miniature displays and supporting products. Its products include OLED display products, driver boards, and optical eyepieces. The company was founded on May 12, 2008 and is headquartered in Kunming, China.

Part of Yunnan Tin Co., Ltd., Yunxi (Hong Kong) Yuanxing) Co., Ltd. operates as an investment holding Chinese company. The company is based in Hong Kong, Hong Kong. Yunxi (Hong Kong) Yuanxing) Co. was acquired by Yunnan Tin Co., Ltd. from Yunnan Tin Group (Holding) Co. Ltd. on April 23, 2015 for $41.57 million.