For example, if you are familiar with gears, you can explain the knowledge of gears, from simple tooth modulus and tooth profile to complex gear meshing and working principle. And they are experienced in some assembly or have their own unique technology. You can also dig them out for the whole company to learn.
Working in an enterprise is a matter of mentality. With the right attitude, there is passion in work. An incorrect mentality is the same in any enterprise.
Good luck!