Remove Bathtub Stopper How Do I Remove The Bathtub Drain Stopper?

How do I remove the bathtub drain stopper? - remove bathtub stopper

I have to help my bathtub drain jumps, but not drain valve. I tried to solve the left and right, partially and drag and try to work to draw anything.
The drain plug is made of metal and seems to be a metal rod slightly lower with a rounded tip, which is located in a small hole for the liquid. The hole in the middle of a sort of thing, Criss Cross.