China's construction machinery industry has continued to rebound since the third quarter of 2016, mainly due to the growth of downstream fixed asset investment, the low base effect of sales in the previous year, and the mandatory implementation of the national three standards. Construction machinery industry after more than four years of industry adjustment, equipment start hours, gross margin, debt ratio and other indicators have basically stabilized, profitability began to recover, the overall sector adjustment basically ended, in good sales data and overseas policy favorable stimulation, the industry value center of gravity gradually raised.