On February 4, Yatong Petrochemical's petroleum coke was quoted at 1,690 yuan/ton, an increase of 20 yuan/ton compared to the previous trading day, with a sulfur content of 4.0. The delayed coking unit has an annual capacity of 1.2 million tons and a daily production of 850 tons. PriceSeek analyzed petroleum coke, with a long-short score of +1. The article indicates that Yatong Petrochemical's spot price for petroleum coke increased by 20 yuan/ton to 1,690 yuan/ton, suggesting a possible tightening in market supply (e.g., the delayed coking unit's daily production is only 850 tons) or increased demand, which is favorable for spot prices. The score is +1 (generally positive), as the price increase is significant but not at a major level, and there are no other negative factors affecting the market.