On December 15th, the Hebei Zhengyuan ammonia unit operated normally, with the manufacturer's quoted price adjusted up by 20 yuan to 2480 yuan/ton. The unit is partially exported, with daily sales of 300 tons. The manufacturer's ammonia unit has a capacity of 600,000 tons. PriceSeek assesses ammonia, giving a neutral rating: 1. The article shows that the quoted price for ammonia in Hebei Zhengyuan was raised to 2480 yuan/ton, and the operation of the unit is normal, with daily sales of 300 tons. The price adjustment directly reflects a tighter supply or increased demand in the spot market, which is positive for the current ammonia spot price. However, due to the small increase (about 0.8%) and no significant supply-demand events, the assessment is considered as moderately positive.