On December 29, the PVC market in Zibo remained stable with a slight upward trend. Today's quoted prices increased by approximately 30 yuan compared to the previous trading day. The futures market turned positive, supporting the stabilization of spot prices. Dealers primarily offered discounts to facilitate shipments, leading to a slight improvement in market sentiment and satisfactory actual transactions. Currently, the mainstream delivery price for calcium carbide-based PVC type 5 is in the range of 4,450–4,500 yuan per ton.