Economic Observation Network The main methanol contract of Zhengzhou Commodity Exchange rose 5% to 2527 yuan/ton; The main contract for propylene surged 5% to 7222 yuan/ton. The main contract for pure benzene on the Dalian Commodity Exchange rose 6% to 6999 yuan/ton; The main contract for ethylene glycol rose more than 3% to 4168 yuan/ton.