Revenue has risen from 4.1 billion to 4.8 billion in the past 5 years, of which it fell 11.8% in 2020; operating profit reached a high point in 2019, fell 26% in 2020, and rebounded 17.4% in 2021; net profit reached a high point in 2018, which should have been income other than the main business. It returned to normal in 2019, fell 32.3% in 2020, and rebounded by 31.7% in 2021. Overall, it increased over 5 years.