[soda ash closed down more than 5% at night trading in Dashang and Zhengshang] Financial Associated Press, May 30, when night trading closed in Dashang and Zhengshang, light industry and oil were among the leading declines. Soda ash fell by more than 5%, palm oil and rapeseed oil fell by more than 3%, PP and soybean oil fell by more than 2%, staple fiber and styrene fell by more than 1%, soybean meal and sugar fell slightly, and a few varieties such as corn and starch closed up.