“What is this?” Zu An was now curious. He opened it up and took a look. He saw eight large words on the title page: ‘Thousand identities, one face; one face, thousand identities.’ All sorts of detailed diagrams followed, analyzing the various parts of one’s face, trunk, limbs, and other areas.

  “This seems to be some teaching material for sketching and anatomy.” Zu An was stunned. A small scrap of paper fell out from the booklet. He picked it up and took a look. It contained Thick-Br..