Professor Zeng Shiqiang once said: "The root cause of all illnesses is tension. As long as your whole body is not tense, you probably won't get sick. Everyone should know that our physiological diseases all stem from tension, but you can't relax. Why? Because many things are always stuck in your mind, causing you to be on edge. Even when there's nothing wrong, you're constantly in fear all day long." Once a person is tense, their aura becomes chaotic, and the blood vessels, internal organs, muscles, and bones are all affected, which naturally leads to illness. If you have a good mindset, always happy and keep your body and mind relaxed, your immune system will be very strong, and diseases won't stand a chance against you.