How did they discover the Yin-Shang ritual vessels?
As a married couple, Zhu Yuanzhang immediately guessed what she meant. He asked, "You mean..."
Empress Ma nodded. "The line of reasoning his elders used when searching for clues to the Yin-Shang ritual vessels is identical to the logic Yu'er used to deduce Confucianism's targeting of mathematics."
Chapter 71