On January 9, Hainan Refining and Chemical increased its diethylene glycol (DEG) quotation by 120 yuan/ton. The latest ex-works price at Hainan Refining is 3,300 yuan/ton, while the ex-works price in Dongguan is 3,330 yuan/ton. The 800,000-ton/year ethylene glycol (EG) unit is operating at 80% capacity. **PriceSeek Analysis – Diethylene Glycol (DEG)** Bull-Bear Score: 1.5 Hainan Refining and Chemical raised its DEG quotation by 120 yuan/ton, with ex-works prices set at 3,300 yuan/ton and Dongguan ex-works at 3,330 yuan/ton, indicating tight supply or strengthening demand, which directly supports spot prices. The significant increase in the quotation reflects bullish market sentiment, but attention should be paid to subsequent changes in unit operations and their ongoing impact on supply. **Ethylene Glycol (EG)** Bull-Bear Score: 0.5 The 800,000-ton/year EG unit is operating at 80% capacity, which may limit production supply and provide slight support to spot prices. Combined with EG futures data, the main contract 2605 closed at 3,846 yuan/ton, up by 7 yuan, with an increase in open interest, indicating stable market sentiment and a slight positive impact on futures prices. The unit operating below full capacity may alleviate supply pressure, but the impact is limited.