The qi of hard qigong is sent to the palm, head and other parts through the instantaneous idea of Tian Dan, which can open the bottle and break the brick for a long time, and the qi bursts instantly;

Health-preserving qi is to maintain the peace of mind in the abdomen and send it to a certain acupoint or focus, so as to achieve the effect of long-term balance of yin and yang and physical fitness. It is peaceful and gentle.