What are the traditional medical methods for diagnosing diseases in China? What is Bian Que good at?

The traditional methods of TCM diagnosis of diseases-looking (looking at colors), smelling (listening to sounds), asking (asking about illness) and feeling the pulse-were first sorted out by Bian Que based on his previous medical experience and his own practice. Among these four diagnostic methods, Bian Que is especially good at interrogation and pulse diagnosis.