On May 16, the price of PVC in Shihua Electric Stone in Dezhou was stable. Type 7 of the calcium carbide method was subject to self-withdrawal of 5950 yuan/ton, and Type 8 was subject to self-withdrawal of 5950 yuan/ton. The spot price was 50 yuan/ton lower. Dezhou Shihua's 400,000-ton PVC plant is not running high.