Stand with the legs comfortably apart, and the feet parallel to each other.
Bend both knees and hips.
Start with the arms open diagonally, palms obliquely facing down.
Push the arms together as the palms turn to a horizontal position.  The hands do not touch.
Pull the arms apart  feeling as if you are pulling taffy apart.
Repeat.

 

Below is a clip of Master William Ting performing Push and Pull. 
To purchase the complete DVD set click here.