Recently, the supply and demand of flake caustic soda market in South China is moderate. The local supply is mainly from the northern stock, and the relationship between supply and demand continues moderately. The downstream alkali consumption is mainly concentrated in industries such as alumina, electroplating, chemical synthesis, etc., and the transactions are purchased on demand. The downstream alumina market atmosphere is weak, and the market procurement is mainly on demand. In the first ten days of October, the northwest region flexibly promoted the quantity, and the market cost did not change much. The atmosphere of the traders' negotiation is stable, and the transaction continues the previous level.