Here’s a video of the second section of your Chum Kiu (Second Form). In this section you’ll be learning to move your body with a step. Since this is the first time you’ll be moving your feet (besides the previous turns), you’ll need to check your centreline each time you step.
The centreline refers to the attacking line of an opponent, or the direct line between you and their centreline. Each time you take a step, this line can change, so it’s important to understand where your focus of intent is directed after each step.