On January 5, the maleic anhydride market in Shandong region experienced a slight increase. The ex-factory price of solid maleic anhydride hovered around 4,900 yuan per ton, while the ex-factory price of liquid maleic anhydride remained around 4,500 yuan per ton. The auction transaction price in Yantai saw a minor decline of 10 yuan per ton, with market transactions primarily driven by rigid demand.