Up to 82 months. In 2022, the cycle of the real estate market in Xiangtan was extended, and the transaction volume of commercial housing in Xiangtan decreased by 22% from the previous month. The longest decontamination cycle is 82 months, and the inventory risk is the highest. De-chemical cycle also refers to the sales cycle of commercial housing. "De-chemical" means sales in the real estate field. The de-chemical cycle of new commercial housing is divided by the current stock of new commercial housing divided by the previous average monthly transaction volume 12.