[soda ash closed at night in Dashang and Zhengshang up more than 4%] Financial Associated Press, May 31, when night trading in Dashang and Zhengshang closed, most of them rose. Soda ash rose by more than 4%, methanol, iron ore and so on rose by more than 2%, PVC and glass rose by more than 1%, plastic and cotton rose slightly, rapeseed oil and palm oil fell by more than 1%, and bean oil and soybean oil fell slightly.