What does dressing index mean in the weather forecast?

Dressing index has 8 levels: level 1: heat; Grade II: hotter; Level 3: slight heat; Level 4: cool, Linyi weather; Level 5: cooler, Shenyang weather; Level 6: slight cold; Level 7: cold; Grade 8: cold. The meteorological index of clothing is divided into 8 grades. The smaller the index, the thinner the clothes. 1-2 is summer clothes, which refers to short clothes with a thickness of less than 4 mm; Grade 3-5 is the transition season of spring and autumn, from single clothes, jackets, windbreakers to sweaters, and the clothing thickness is 4-15 mm; Grades 6-8 are winter clothes, mainly referring to cotton-padded jackets and feather eyes, and the clothing thickness is above 15mm. Related articles: Four counties in Tianshui were hit by hail and flood, resulting in direct economic losses of nearly 100 million yuan. The water level of Wanquan River falls, and citizens go fishing along the highway.