The production cost of home appliance industry mainly focuses on raw materials, fixed assets and labor cost, of which raw materials account for the main part. In the fourth quarter of 2018, some raw material prices rose slightly, and most raw material indexes rose slightly, which to some extent increased the cost pressure on the household electrical industry. Although the price of raw materials continues to rise, the overall gross profit rate has been revised back, down 6.3 percentage points from the same period in 2017. In the second half of the year, the annual growth rate of retail sales from July to October was significantly lower than that in the same period of 2017. Although the consumer psychology of "taking the last bus" in November and December promoted the retail growth rate of home appliance market to pick up,