Wing Chun has 3 traditional forms:

1. Siu Lim Tao
2. Chum Kui
3. Bil Jee

Sifu Chow's years of practice of whole system, gave him opportunity to develop a faster and more effective way of learning Wing Chun by adding 2 switching forms:

1. Siu Lim Tao Switching
2. Som Kwok Ma Chum Kui - Chun Kui Swirtching.

Students are always in question, why this is change that way ? The simplest answer is : "to have easier and faster transition between all traditional forms".