On January 4, the maleic anhydride market in Shandong region experienced a slight increase. The ex-factory price of solid maleic anhydride hovered around 4,850 yuan per ton, while the ex-factory price of liquid maleic anhydride was around 4,450 yuan per ton. The auction transaction price in Yantai rose by 40 yuan per ton, with market transactions primarily driven by rigid demand.