On January 9, Sinopec raised the diethylene glycol (DEG) quotations in East China. Shanghai Petrochemical increased the price by 140 yuan/ton to 3,170 yuan/ton, with its No. 2 unit operating at a low rate. Yangzi Petrochemical raised the price by 150 yuan/ton to 3,300 yuan/ton, also operating at a low rate. Yangba Petrochemical increased the price by 150 yuan/ton to 3,300 yuan/ton, with its 340,000-ton/year unit running at approximately 40% capacity. PriceSeek's analysis of diethylene glycol shows a bullish-bearish score of 2. On January 9, multiple Sinopec companies in East China raised DEG quotations. Shanghai Petrochemical, Yangzi Petrochemical, and Yangba Petrochemical increased prices by 140–150 yuan/ton to 3,170–3,300 yuan/ton, while operating at low rates (e.g., Yangba Petrochemical's 340,000-ton/year unit running at only 40%). This indicates tight supply in the spot market and strong demand. Supply constraints directly drove up spot prices, with optimistic market sentiment, representing a significant positive factor.