trains the body in a soft way
Erlu trains the techniques in a vigorous way
With both combined, then you know Taijiquan
The main purpose of
Therefore, the training of is for changing the body structure. In general, is to itself.
Erlu is different. As the body itself is already trained, the structural force is gained, on top of which, we want to add gong. This is accomplished by movements. The basis of Erlu is to not think about body parts themselves, completely forget about them(the body parts are loose, no need to be considered), the focus is on the movements, which have to be done with a lot of power, speed and difficulties, being more strict according to the application requirements of Taijiquan. This is like you are hammering a nail, you don’t think about the nail, no matter how hard it is, you just swing the hammer and the nail with power.
At this point, Erlu is to train application techniques, which we spend a lot of time on. This is to train the methods of Taijiquan.
When both of these two elements are in position, you can do Taijiquan!