External qi (emitted qi) is a substance of negative energy

Based on testing results in the scene of qigong lecture given by master Yan Sin, the author assumes boldly that external qi is a negative energy. According to the fact that the outer flow of life energy can not be shielded, and it can transmit within a long distance and carry sweet-smelling information, the author did not think the external qi is the wave of positive frequency included radio, secondary voice wave etc. The author considers that outer flow of life energy is a negative wave produced by mixing the essential wave of the universe and human essential wave in accordance with the theory of ancient scholar engaged in research on human body and using comparative and sieving method. Then the wave of positive frequency that draws attention of scientists up to now is extended to the wave of negative frequency.