On May 9th, according to the latest quotation from Baichuan Information, the highest bid for Sodium Carbonate exceeded 2100 RMB/ton, and the heavy Soda was up to 2300 RMB/ton.In some areas, heavy soda increased more than 10% in a week. Since the second season,the prices of soda ash have generally risen by 20%. This is related to the short-term concentration of maintenance period of soda ash manufacturers. At the same time, the industry de-capacity led to contraction in supply.Institutions generally believe that the second season's high degree of prosperity facilitate to thicken the performance of listed companies in the first half of 2018.