What's the difference between China Petrochemical and China Petrochemical?

There is no difference. According to Caijing.com, Sinopec and China Petrochemical both refer to sinopec group, and "Sinopec" is the abbreviation of "China Petrochemical". Sinopec group, with a revenue of 3.32 trillion yuan in 2022, is referred to as "China Petrochemical" or "Sinopec". It is a super-large petrochemical enterprise group reorganized by the state on the basis of the original sinopec group 1998. It is a central enterprise directly under the State-owned Assets Supervision and Administration Commission of the State Council with a registered capital of 326.5 billion yuan. Its chairman is the legal representative and its headquarters is located in Beijing. The company exercises the rights of investors such as asset income, major decision-making and selection of managers on the relevant state-owned assets of its wholly-owned enterprises, holding enterprises and shareholding enterprises, operates, manages and supervises the state-owned assets according to law, and undertakes the corresponding responsibility of maintaining and increasing the value. China Petrochemical Co., Ltd., which is controlled by the company, issues H shares and A shares overseas and domestically, and is listed in Hongkong, new york, London and Shanghai respectively.