Centreline

Chung Sum Seen
The Chung Sum Seen (central heart line) is a vertical line that runs down the centre of the body. The Chung Sum Seen is the line you should defend as it is the opponents most likely target. Many lethal striking points are located down the Chung Sum Seen such as eyes, nose, throat, solar plexus & groin. Also by making our Chung Sum Seen face the opponent In Siu Lim Tao we never turn or move the body, so that full understanding of centreline is understood. Marking centre & section 1 shows us where our Chung Sum Seen is. In Chi Sau we should strive to constantly protect our Chung Sum Seen by keeping our elbows in on our Fook Sau & keeping the elbows on the correct pathway with Tan & Bong Sau.

Jik Seen
Jik Seen means straight line/pivot. This is a vertical line which goes through the core of our body. So whenever an opponent attacks us they are aiming at our Jik Seen. The opponents Jik Seen is the best place to strike them as because it is the bodies core it cannot diserse force, whereas if the shoulder for example is struck the body can turn to move with the blow, therefore lessening impact. In Yee Jee Kim Yuen Mar the Jik Seen from the front is lined up with the Chung Sum Seen, however in Chuen Mar it moves to either side, & out of the way of an attack.

Say Mm Seen
Say Mm Seen means 4-5 line literally 45* line. This is a horizontal line which connects you to your opponent. The best way to attack is directly along the Say Mm Seen, so it is vital you guard it. The advantage of having a frontal stance is that while your Chung Sum Seen is lined up with the the Say Mm Seen it may seem that this is bad, but actually it is advantageous because you can defend to 45* either side of the Say Mm Seen & then strike at the same time along it at the same time.