The second solo bridge hand is a sequence of 6 movements which we denote 3-WS which is short for 3-whipping strikes.

3-WS provides training for the following :-

1) Rolling block which is the most famous NGK technique; the proper NGK technique made up of the rolling block and punch is shown in the two-hand version of 3-WS

2) How to move the arm like a whip to execute three sequential strikes

3) Relaxing the arm to allow it to respond like a willow tree branch when pressure is applied to it

The movements of the 3-WS are :-
1) Rolling block
2) Single punch using overturned horizontal fist (like the Xingyi drilling punch)
3) Hook hand strike
4) Horizontal palm strike
5) Back of palm strike
6) Pull back palm to right shoulder to parry

Work on basic familiarity. When you are used to it you can add in the body mechanic that is specific to the rolling block to bring out the NGK characteristic, if desired.