Why does Shandong Lunan Pharmaceutical Recruiting Salesman want to find a guarantor? If they leave, do they all owe the company money?

This should be based on your own situation. Generally, there is no need to guarantee the work of a regular enterprise. Unless you are a foreigner, you have not provided them with anything that can prove that you are capable of taking corresponding responsibilities, or your education does not meet the requirements of the company's general recruitment, so the company wants you to provide a guarantee for the safety of the company's property.

On the other hand, if the company requires everyone to be a guarantor and there is no appeal, then this is the case. The company's requirement for this position may be due to the consideration of commercial insurance experienced by the salesman, and there is nothing wrong with it. You can stay if you want, and change to another company if you don't want.