On January 8, Tongling Chemical Industry Group's phthalic anhydride capacity is 80,000 tons. The ortho-xylene-based phthalic anhydride unit is operating normally, while the naphthalene-based phthalic anhydride equipment is temporarily shut down for maintenance. Inventory is low, with the ortho-xylene-based phthalic anhydride quoted at 6,000 yuan/ton. The price has increased and is subject to limited sales. PriceSeek's analysis of phthalic anhydride shows a bullish-bearish score of 2. The temporary shutdown of Tongling Chemical Industry Group's naphthalene-based phthalic anhydride equipment has led to an overall reduction in supply. With low inventory, the ortho-xylene-based phthalic anhydride price has risen to 6,000 yuan/ton and is being sold in limited quantities, indicating a supply shortage in the market. This will significantly drive up the spot price of phthalic anhydride, as constrained supply combined with strong demand creates a major bullish driver.