Your house needs regular cleanup. Your cloth needs to be washed regularly because everything may get dirty after being used for sometime. What about your body, will your body need to be cleaned up regularly? The answer is Yes. Your body will be impacted negatively due to air pollution, food pollution, physical stress, emotional stress or injury, which may create blockages and negative Qi in your body. The blockages and negative Qi may turn to illnesses or cancer if not cleaned up, which is the may focus in Crane Qigong.