Today, a new patient named "$ERA" came to the emergency room of Xiao An Clinic. Unlike the usual new emergency patients, ERA did not show much external bleeding. Trading is similar to traditional Chinese medicine, which emphasizes observation, listening, inquiry, and pulse-taking; trading is no different from these four principles. Observation: The patient initially rose against selling pressure at the opening, then fell back to stabilize, accumulating volume on the 15-minute line under continuous high selling pressure; Listening: The clinic has recently renovated its equipment, and patients are flocking in. There are even rumors that a foreign relative named Coinbase came to visit, taking up precious emergency bed space in the clinic; Inquiry: Through questioning, it was learned that a family member named "AltLayer" has a long lifespan of 69 years, and this 15-year-old patient has a high potential for longevity; Pulse-taking: The patient's pulse was beating too fast, with a sudden 30% increase at 00:05, indicating a possibility of a relapse; Connecting the changes of ancient and modern times, this is a unique perspective. This is what is meant by teaching the physician.