How about the night shift of security guards in Wei Chai Foundry?

The company's security guards are very tired at night.

The night shift work of security guards is quite harmful. If you often work night shifts, it may lead to lack of sleep, affect your health and lead to decreased immunity.

Moreover, the night security of Wei Chai Foundry is bound to patrol all the factories, and it is impossible to concentrate while resting, so the work is quite tiring.