I also need to think about common questions people might have. Like, how accurate is Mian Xiang? How do you interpret multiple conflicting signals? The role of personal development in influencing facial features (like how habits can affect facial expressions over time).
Wait, the user asked for a "solid guide," so it needs to be thorough but concise. Maybe bullet points or numbered sections would help. Also, ensure clarity without jargon. Define terms when necessary. Since the user mentioned a PDF by Monica Koppel, I should highlight her contributions and any unique insights she brings. Perhaps she combines modern psychology with traditional Mian Xiang techniques. Lectura Del Rostro Mian Xiang Monica Koppel.pdf
Also, the balance between the left and right sides of the face is important. If one side is more developed, it might indicate different inclinations. The three major parts of the face could be considered for different stages of life—forehead (early life), middle face (middle age), and lower face (later years). These are common elements in Mian Xiang that I should include. I also need to think about common questions