Based on the above analysis, the continued decline in the return on net assets from 2014 to 2016 shows that the returns on business investments are not high, reflecting the low efficiency of the business in using its own capital and the capacity of its own capital to obtain returns is low. Profitability is very unsatisfactory. Since 2017, the increase in the rate of return on net assets has become more significant, indicating that profitability has greatly improved and profitability has gradually improved.