Yihua Group is one of the top ten most influential representative enterprises in China's petrochemical industry. The group's headquarters is located in Yichang, Hubei. It owns more than 20 legal entity enterprises, including 2 listed companies (Hubei Yihua, Shuanghuan Technology), and 5 Sino-foreign joint ventures. It has R&D centers and manufacturing bases in Beijing, Hubei, Hunan, Henan, Hebei, Yunnan, Chongqing, Guizhou, Sichuan, Shanxi, Inner Mongolia, Xinjiang, Ningxia, Qinghai, Heilongjiang, and Vietnam. The group focuses on developing five pillar industries: fertilizers, chemicals, mining, trade, and real estate development, with over 60 types of products. The current total assets are 40 billion yuan, with more than 50,000 employees. In 2009, it achieved sales revenue of 30.5 billion yuan, with annual export earnings of 200 million US dollars, ranking around 180th among the Top 500 Chinese Enterprises. ■ Yihua is the world's largest fertilizer manufacturer, producing 12.5 million tons of chemical fertilizers annually. ■ Yihua is the world's largest polyol production base, producing 110,000 tons of pentaerythritol annually. ■ Yihua is the largest well mine salt enterprise in Asia, producing 3 million tons of vacuum salt annually. ■ Yihua is China's largest soda ash producer, producing 2.5 million tons of soda ash annually. ■ Yihua is China's largest chlor-alkali chemical producer, producing 1 million tons of PVC, 1 million tons of caustic soda, and 1.2 million tons of calcium carbide annually. ■ Yihua is the largest nitrate ammonium producer in Northwest China, producing 300,000 tons of nitrate ammonium annually. Chongqing Yihua Chemical Co., Ltd. As one of the five pillar industries of the Yihua Group, the salt chemical industry holds a pivotal position in Yihua's strategic layout.