1, essence is tangible and the essence of human body, including blood. It plays an important role in protecting life and preventing the invasion of foreign evils.

2. Qi is invisible and the source of life-sustaining activities. Constantly circulating in the body, forming a powerful protective layer to resist the invasion of external evils.

3. God is invisible, the true master of life, the highest energy in the three treasures of life, and the strongest ability to protect life.