At the beginning of this year, we signed the contract of semi-anechoic room project with Xingyue electric appliance. The project was originally planned to be completed in early March this year. Due to the impact of the epidemic, the project could not be started. In the case of no resumption of work, we actively contacted and communicated with customer, deliberated on the installation scheme and difficult project schedule, and obtained the approval and cooperation of customer. After the formal resumption of work in March, the Production Department, Project Department and Technology Department actively promoted the project. The project was completed in mid May, and was tested and measured by a third-party measurement unit a few days ago, which fully met the design index requirements and was successfully accepted.