O! Aura reading is one factor, however, Medical Knowledge or knowhow 医方明 is crucial!
So with medical knowledge, when One reads an aura of a subject, One will correlate the Signs & Symptoms exhibited by the subject's Body-Speech-Mind, AND come to a verdict or diagnosis!
The difference in this type of Diagnostic practice is One do now need Subject's medical history, age, or physical examination...... :)
Remember that GM Lu said that even watching the recorded video of Heruka event can heal?
Remember also that GM Lu said that he tested Ksiti rinpoche in reading subjects from their photos?
Remember that photos of altars and people were shown to me, to wenshi?
Am I bluffing as most alleged?
Who cares, Not me!
Om Guru Lian Sheng Siddhi Hom