A lesson on Sun Style

Today in the Sun Style lesson, my teacher told us to demonstrate the Single whip for him to see. Mine had problems right from the opening and closing of hands.
Open to shoulder width
Close to face width

Next, for Single Whip(dan bian), while i did it, he said i did not have the required opening "look". This is when i remembered that sometimes in his demonstration when he closes, he seems to be absorbing everything around him. It is that kind of "look" that he wants me to have. It is a qi shi, a sort of impression that you project. It is not easy to learn....so I'll just have to work on it......This kind of thing cannot be taught in words, only in action....