1. Salt drying in salt fields requires sufficient sunshine, high temperature and large evaporation. July-September is the local rainy season, and April-June is most suitable.

According to the relationship among faults, salt beds and groundwater enrichment areas, the main condition affecting the formation of brine in salt wells is crustal movement, that is, crustal movement causes faults in rock strata, and faults connect groundwater enrichment areas with salt beds, which increases the salinity of groundwater and makes groundwater recharge salt wells to form brine.