In June 2008,Wuhai Chemical Industry Co.,Ltd.commenced the produc-tion of the new 150 000 t/a PVC and 150 000 t/a caustic soda units in Wuhai,Inner Mongolia.It is the first phase of the 300 000 t/a PVC and 300000 t/a caustic soda project.With a total investment of RMB2.2 billion,construction on the project