Not only is Joan Chen a beautiful square jawed woman, her facial bone structure is also very large.

See how Joan Chen on the right, has a much larger face structure than the other, more gracile woman

Again, the face structure on the right is unquestionably bigger. Bite force is also probably magnitude stronger.

You can clearly see the structure of the chin. That big bone projecting forward.

Magnificant heavily structured face.

She is not that young, yet see how the long jaw stretches the chin skin, eliminating any double chin. Large jawed women age better