Feng Gao

Dezhou United Petroleum Technology Co., Ltd. engages in the research, development, production, and sales and leasing of special tools and equipment for oil drilling. It provides maintenance and leasing services of petroleum equipment, drilling tools, accessories and ancillary products, design, manufacturing, sales and maintenance of geothermal recirculation equipment and environmental protection equipment, and technical consulting services, negative pressure environmental protection recycling devices production and sales, drilling rigs, drill bits, profile control water plugging pumps, plugging agents used in profile control water plugging technology, grouting pumps, drilling mud non-landing systems, sewage sludge treatment systems, wellhead sludge recovery devices, oil and gas production wellhead devices , design, manufacturing, sales and maintenance of valves, choke and kill manifolds, technical consulting services; petroleum mechanical processing; drilling of oil, natural gas, coal bed methane, deep and shallow geothermal, directional wells, horizontal wells, profile control and water injection Engineering and technical services; mining disaster management, surface plating business; construction and installation projects, sales and installation of mechanical and electrical products; general cargo transportation; import and export of goods and technology. The company was founded in September 1961 and is headquartered in Dezhou, China.

Yantai Spandex Group Co., Ltd. engages in the wholesale and retail of clothes, knitted underwear, towels, clothing, and other textile products. The company was founded on October 21, 1998 and is headquartered in Yantai, China.

Wanhua Industrial Group Co., Ltd. is a holding company engages in methylene diphenyl diisocyanate (MDI) and polyurethane (PU) business. Its products include petro-and–coal chemicals, MDI and PU derivatives, construction energy-saving materials, agricultural strawboard, and intra-group financing platform. The company was founded on October 29, 2001 and is headquartered in Yantai, China.

Yantai Guofeng Investment Holding Co., Ltd. engages in the financing, investment, and management of government and industrial projects. Its business activities include capital operation of state-owned property, venture capital business, provision of entrepreneurial management services, establishment of venture capital investment companies and consulting agencies, and provision of consulting services. The company was founded on February 12, 2009 and is headquartered in Yantai, China.

Beijing Huayuantaimeng Energy-Saving Equipment Co. Ltd. engages in the provision of energy saving technology services and equipment. Its products include heat absorption transfer unit, flue gas heat recovery unit, direct fired heating unit, thermal network heating unit, and gas heating unit. The company was founded on September 23, 2011 and is headquartered in Beijing, China.

Zhuhai S.E.Z. Hongta Renheng Paper Co. Ltd. is a Chinese company that manufactures paperboard products. The private company is based in Zhuhai, China.

China National Paper-Industry Investment Corp. is a Chinese company that manufactures and distributes paper products. The company is based in Beijing, China. The company is ultimately controlled by the Government of China.