Chinese divination · physiognomy
Chinese face reading 面相: the three courts, the five officials, and the twelve palaces
Most people arrive at this subject because somebody said something about their face. A relative, a fortune-teller at a temple fair, a comment thread about chins. So the useful thing to say first is the thing the classical manuals say themselves: no single feature carries a verdict, the practice was contested inside China from the beginning, and the most quoted line in the entire literature tells the reader to look at a person's heart before looking at their face.
What follows is the actual system, taken from the manuals rather than from the listicles. Chinese face reading, mianxiang, is one branch of xiangshu, the art of reading form, alongside palmistry and the reading of bones. It has three frames, and they are applied in a fixed order: divide the face into three horizontal courts, weigh the five features that hold office, then locate the twelve palaces. Everything else is detail hanging off those three.