In terms of sales, compared to 2019, it fell by 21.7% year-on-year to approximately RMB 457 million. Mainly due to the significant impact on the revenue growth in the first quarter arising out of the delay in the resumption of work and production of the Group and upstream and downstream enterprises as a result of the influence of the outbreak of COVID-19 at home and abroad. In addition, the construction of 4G networks of China’s domestic mobile communication enters a later stage, and the capital expenditures of 4G networks of domestic operators further decline significantly. However, it can be seen that the group's 5G product revenue is a trend of rapid growth. At the same time, it further participates in the application of vertical industries and has made some breakthrough progress.