Since studying Ai Zhi, I have changed from a patient full of pain to a person who is cheerful, loves to laugh, full of energy, can eat and sleep, and knows a lot, which is different from others. When chatting with others, I hear that people have pain and there is no cure, and I have both regrets and regrets. I am a self-learner, and I know too little. I am sad to see a tiger sick.