There are dozens of company security guards. Why did you arrange for me to work 12 hour night shift?

This is legal. It is legal for dozens of company security guards to arrange night shifts 12 hours by themselves. It is legal for security guards to be required to work at night for a long time, but it is unreasonable because it is unreasonable work arranged by the company. No matter whether there are two shifts or three shifts, they are all changed in turn, and you can raise an objection to the company. However, unless there is a special agreement or special subsidy before joining the job, it is illegal to be required to work at night for a long time, and you can appeal to the superior leader or the labor bureau.