mook jong man
Senior Master
NOW I see what you are getting at. I have never heard the term 'Chark Jong'. This is a new one to me. I get what you are saying but ultimately its something I would have to feel. Same as with these drills. The only thing about the double tan sao is that Im in the habit of having attack AND defense at the same time at all times. But of course there are always exceptions.... such as a bong & wu.
Generally speaking in most cases you would use the double Tan Sau on the outside of both his hands to simultaneously trap and strike through , in training we usually strike through with both fists to the chest.
But if it was for real you could strike the face or pierce through to both sides of his throat then jerk down on his arms with a double Jut Sau and low heel kick and then finish with a double palm strike.
In the configuration that your doing with one hand on the inside and one hand on the outside you can do exactly the same technique except one Tan is on the inside piercing through and the other Tan is on the outside of his wrist piercing through.
Due to the angles of his arms and whether they are tense or relaxed etc either both your hands will strike through or it may only be one , the difference is that we can't do the double Jut Sau because one arm is inside his arm.
But what I can do is with the hand that was on the outside I now drop my whole forearm down horizontally (like one half of a Lan Sau that just drops straight down) ,trapping both his hands as I disengage my inside hand from underneath and hit him again or elbow strike.