We say that a high-level doctor must first have high-level medical technology. Without technology, even the best medical ethics is a flower in the mirror. If we put aside the objective things such as papers, academic status and professional titles (if you want to know a doctor, you can first know his professional title and academic position, professional field and where he works from official website), a high-level doctor has three characteristics as far as outpatient and emergency services are concerned. The first is that he can get more information from limited materials, and the second is that he can quickly get effective and valuable information from massive materials, thus drawing a preliminary conclusion. The third is to know when and where you can't do it, the referral, and the consultation.