Attention:

This punch bag is empty, you need to fill them.
Different fillings will condition your knuckles differently.Rice is generally a good filling to start with. Dried beans like black eyes beans or kidney beans give a slightly harder impact. ,the sand is not a best choice.
The wall bag is a great way to practice the various strikes of the Wing Chun system, it can also help to develop power in the last inch of the strike .The benefits of Wing Chun Kung Fu extend to body control, co-ordination and balance,and is akin to relearning how your body works.