December 31 News On December 31, Yantai Wanhua conducted a maleic anhydride auction: - Yantai session: auction volume 90 tons, all 90 tons sold at a transaction price of 4,260 yuan/ton. - East China session: auction volume 150 tons, all 150 tons sold at a transaction price of 4,700 yuan/ton. Chempricehub Analysis of Maleic Anhydride, Bull-Bear Score: +1 Maleic anhydride was fully sold at 4,260 yuan/ton in the Yantai session and 4,700 yuan/ton in the East China session, indicating strong demand and tight supply. The significant regional price difference (higher in East China) is favorable for the spot market and may drive up overall spot prices. The rating is moderately bullish (+1.0), as the auction results reflect short-term supply-demand imbalance but do not involve major events, with moderate impact.