The implementation of a tight monetary policy has led to the rigidity of purchase settlement, which has brought huge cost and capital pressures to the majority of production enterprises. The main raw materials produced, such as natural rubber, synthetic rubber, steel wire, steel cord, various chemical auxiliary materials, coal, etc., have frequently hit historical highs and resources are extremely tight. The average price of imported 20# standard rubber in 2007 was US$2051/ton, which rose to US$2,200/ton at the beginning of this year, and the price reached US$2800/ton at the end of April. By June 18, the price was 3280 yuan/ton, which is an increase from the beginning of the year. Over 49%; the average purchase price of domestic 5# rubber in 2007 was 19,341 yuan/ton, which rose to 20,400 yuan/ton at the beginning of this year, and reached 23,000 yuan/ton at the end of April. By June 18, the price was 28,000 yuan/ton. The price increased by more than 37% over the beginning of the year; the average price of chlorinated butyl rubber in 2007 and the price at the beginning of 2008 was 48,800 yuan/ton, the price rose to 79,000 yuan/ton at the end of April, and the price was 100,000 yuan/ton on June 18. At present, the price has increased by more than 104% compared with the beginning of the year; the average price of tempered steel wire in 2007 was 6000 yuan/ton, and at the beginning of this year it rose to 6700 yuan/ton. At the end of April, the price reached 8000 yuan/ton, and the price was 10500 yuan/ton on June 18th. Tons, the price increased by more than 56% compared with the beginning of the year; until June 18, the prices of various auxiliary materials increased by more than 30% compared with the beginning of the year; the current price of raw and auxiliary materials compared with the average price of 2007, the comprehensive price increase rate exceeded 40%, which directly led to The cost of tire sales increased by more than 25%.