What does the goalkeeper of Dachang mean?

The "big factory gatekeeper" refers to a specific working group in some cities or regions in China. They are mainly responsible for safety inspection and management at the gates or gates of big factories, factories, enterprises, communities and other places to ensure the safety and order of people and vehicles entering and leaving. According to the relevant public information, these goalkeepers are generally employed by big factories or enterprises, and they need training and assessment, and they have certain safety precautions and service skills, such as checking ID cards, checking parcels and skillfully using communication equipment. In some cities, the gatekeepers of big factories are also called "security guards", "doormen" and "access controllers". Work usually requires 24-hour shift duty, which is one of the important forces to maintain social security and stability.