Reflection angle strike to the face – Brush Knee Twist Step (搂膝拗步)
Taijiquan (太極拳) fighters use the open-palm strikes toward the opponent face when they fight.
A picture shows “Brush Knee Twist Step (搂膝拗步)”. Open-palm strikes are effective ways to fall down the enemy with inducing a brain concussion without outer damages.
If the open-palm strike is a technique as a similar level of slapping or spanking, we could not say that Taijiquan (太極拳) is martial arts. If so, there is no tradition.