Flexible crossing the valley is a health care method developed by researcher Zhang on the basis of discovering and proving that "the hungry originated from flora", and then putting forward the theory of "new medicine", "microbial heart", "carbon source" and "cloud hospital", combined with his long-term personal experience and scientific analysis and summary. After feeding a pack of soft cereal drinks to the flora three times a day, you can only drink water, but you can't eat or satisfy your hunger.