Point 20 (5t-34) :
Draw a vertical line passing through the outer border of
the knee-cap and a horizontal line passing through the upper
border of the knee-cap.

Point 20 lies two thumb-widths above the intersection of
these lines.

Point 21 (5t-35) :
At the front of the knee, just below the knee-cap, can
be seen two depressions (on either side of a rope-like
structure),
Point 21 lies at the centre of the outer depression.

Point 22 (5t-36) :
Bend the knee joint by 90 degree•
Now from the lower border of the knee-cap, move three
thumb-widths downwards. You will be able to feel a pointed
bone at this level (marked V in the adjoining figure).
Point 22 is located one finger-width to the outer-side of this
pointed bone.