The procurement department has a large storage and transportation area, a wide work area, scattered work sites, and foreign personnel entering and exiting. Epidemic prevention is particularly important.

In the early stage of the outbreak, in order to make everyone feel at ease to go to work, the two porters, Zhang Lijun and Lu Ming, never cared about personal gains and losses. They arrived at work early every day, equipped with disinfectant, and "killed" without leaving dead ends. A "protective net" for the epidemic. They are more careful in disposing of disinfectant than laboratory personnel; their skilled and professional "killing" techniques are comparable to professionals. They not only have to overcome the physical discomfort caused by the pungent taste of "sodium hypochlorite", but also the discomfort caused by standardized personal protection. When they carried the 25 kilograms of spraying equipment to kill, there was no complaint. It was their silent dedication that brought us a safe environment. They deserve our respect and praise!