Hengli Petrochemical Co. Ltd. has signed a long-term agreement for Saudi Arabian state-owned oil giant Aramco to supply it with around 20 million tons of crude oil a year, starting in October. It is thought to be the first such supply deal between Aramco and a private Chinese oil company. The crude will be sent to Hengli's refinery in the special economic zone on Dalian's Changxing Island in China's northeast. Some 270,000 tons of Saudi Arabian medium crude reached the refinery on June 28, with state-owned Sinochem Oil Co. Ltd. assisting with customs clearances, as per a trading agreement signed in January.