How to adjust the measuring prism rod when it is crooked?

The bubble in the prism rod is centered, but the rod is crooked, right?

Adjustment method: erect the total station at any position, and place the prism rod at a distance of about 10m from the instrument (the distance is determined by yourself). Don't look at the bubble, adjust the verticality of the prism bar with an instrument, fix the prism bar (preferably with a tripod), then adjust the three screws under the bubble of the prism bar, adjust the bubble to the center, and then rotate the prism bar 90 degrees in situ. The method is the same as above. Adjust the bubble to the center again and bring it back after repeated times.