On December 10th, the Hebei Zhengyuan ammonia unit operated normally, with the manufacturer's quoted price adjusted up by 40 yuan to 2440 yuan per ton today. The current quote is 2440 yuan per ton, with some of the product being sold externally, achieving daily sales of 300 tons. With a total capacity of 600,000 tons, the increase in the manufacturer's quoted price suggests that there is a tight supply or increased demand in the market, which is positive for the spot prices of ammonia. The stable operation of the unit and daily sales of 300 tons indicate that sales are stable, supporting an upward trend in prices. Combining this with a production capacity of 600,000 tons, the current price adjustment might be driven by higher costs or improvements in regional supply and demand, which have a positive impact on the spot market.