On December 29, the PVC market in Linyi experienced a slight uptick. The futures market fluctuated with an upward trend, while the spot market adjusted in line with prevailing conditions. Dealers' quotations increased by approximately 20 yuan compared to the previous trading day. Market sentiment remained moderate, with satisfactory transaction volumes. Currently, the mainstream quotation for calcium carbide-based PVC type 5 ranges between 4,480 and 4,520 yuan per ton.