On May 27, the mainstream price of liquid caustic soda in Shandong remained stable, with an increase of approximately 10 CNY/ton in the Jining area. The mainstream transaction prices for 32% ion-exchange membrane caustic soda were as follows: 580-600 CNY/ton in southwestern Shandong, 570-630 CNY/ton in central-eastern Shandong, 630-650 CNY/ton in northern Shandong, and 620-640 CNY/ton in southern Shandong.