Conducting epidemiological investigations is vital during the fight against contagious illnesses. However, such teams were usually scraped together when an outbreak emerged, leading to a shortage of staff and insufficient capabilities. That's why the State Council's Joint Prevention and Control Mechanism decided to establish a team consisting of 300 professionals devoted to epidemiological survey work in September. Since then, we are always on standby. Some of my fellow team members spent two-thirds of a year either on the front line against the disease or in centralized quarantine.