In the past 5 years, with the exception of 2018, revenue grew at an average rate of 6%. Operating profit contracted only 9.8% in 2021 due to fluctuations in gross margin, and grew at an average growth rate of 13.4% for the rest of the 4 years. Net profit shrank sharply by 36% in 2020 due to capital asset impairment, with an average growth rate of 11.1%. Interest expenses account for 25% of operating profit in 2022, and the interest burden is heavy. The return on net assets is as high as 40%.