On December 29, Shandong Tianhong Chemical Co., Ltd.'s petroleum coke was priced at 1720 yuan/ton, a decrease of 80 yuan/ton from the previous trading day, with a sulfur content of about 4.2%. The company operates a delayed coking unit that produces 1.8 million tons per year, producing 1000 tons of petroleum coke daily. PriceSeek analyzes the petroleum coke and assigns a negative rating of -1.5. The article shows that the spot price of petroleum coke has been adjusted downward by 80 yuan/ton to 1720 yuan/ton, a decrease of approximately 4.65%, indicating that there is downward pressure due to an ample supply of inventory in the spot market or weak demand. The direct impact of the price adjustment is the increase in inventory or weakening consumption, which significantly bears a negative effect on the spot price. The rating is based on the significant decline but not reaching extreme levels, classifying it as a medium to severe bearish signal.