PetroChina Company Limited (simplified Chinese: 中国石油天然气股份有限公司; traditional Chinese: 中國石油天然氣股份有限公司; Uyghur: چوڭگو نېفتى‎ ) is a Chinese oil and gas company and is the listed arm of state-owned China National Petroleum Corporation (CNPC), headquartered in Dongcheng District, Beijing.[3] The company is currently Asia's largest oil and gas producer[4] and was China's second biggest oil producer in 2006.[5] Traded in Hong Kong and New York, the mainland enterprise announced its plans to issue stock in Shanghai in November 2007,[5] and subsequently entered the constituent of SSE 50 Index.