Which position of thermos cup has higher salary?

Does the subject want to ask "which position in the thermos cup factory has a high salary"? Engineer. According to the recruitment information of the thermos cup factory, the engineering designer of the thermos cup is a product designer, which belongs to mental work, and the highest salary is 7000 yuan/month, while the assembly line staff of the thermos cup belongs to piece-rate salary, which is quite different from the designer, which is 3500 yuan/month. A thermos cup is a water container made of ceramic or stainless steel with a vacuum layer.