Yes, but unprofessional crossing the valley will be harmful to your health. I suggest that you should listen to the guidance of professional teachers before crossing the valley, so as to at least ensure safety. There are many large and small training institutions in China. For example, there are many training courses, such as Hu Yaozhong's health class and Guo's class. You can check online yourself and recommend Mr. Hu. He also wrote a book, preaching to the valley for 30 years. Hope to adopt, thank you.