Last week, the domestic caustic soda market is weak. Protopine producers have low overall inventory, but because the liquid alkali prices in the upper reaches continue to decline, they have a greater impact on the caustic soda market. The current market is still less positive, the market wait-and-see atmosphere is still there, the actual transaction is difficult to improve, participants are cautious It is expected that the protopine market will mainly follow the market in the short term. In view of this, it is recommended that downstream companies and traders can make up their positions as needed. In the later period, more attention should be paid to the trend of liquid caustic soda prices and the situation of alumina signing.