Of the 21 full-automatic mask production lines that PetroChina plans to build, 20 have been in place and produced export masks. On April 1, the daily output exceeded 600,000 and reached 603,100; the cumulative production of masks exceeded 10 million and reached 1045. Million. The four production line units have obtained "Medical Device Registration Certificate" and "Medical Device Production License", which are fully equipped for product sales, and are continuously producing and exporting masks to the society.