I once asked if Peng Jing is about expansion then what exactly is An Jing and no one has answered this questioned because I suspect the majority does not know the answer.
I once read a book on Yang style Tai Chi Chuan in which a ton of Jing were defined. At that time it was a wonderful discovery for me to know this information. But later I had to ask how useful would so many types of Jing be. Consider that you are doing push hands and your training partner suddenly feeds you a random technique. How do you decide which Jing to use within a split second out of the X number of Jings?
But then if Tai Chi Chuan is all about Peng Jing then what happens if your training partner has figured you out and can consistently prevent you from issuing Peng Jing? What then?
As you can see in the previous post we have 8 fundamental types of Jing in Yang style small frame Tai Chi Chuan. This is small enough a number for us to learn and yet retain the flexibility to allow us to have an answer to a wide variety of attacks. The more advanced Jing method is even simpler than this which goes to show that Tai Chi Chuan is an art that is at once straightforward yet highly complex underneath the elegantly simple exterior. This is what a true internal art is like.
So to answer the question I once asked – An Jing is the counterpart to Peng Jing. The various 8 jings originate from the rotation and expansion / contraction of the sphere. Bet you didn’t think of this, huh?