People may feel guilty (内疚的) and even blush (脸红) with anxiety when their secrets are revealed. In China, the idiom loumajiao (“to reveal a horse’s foot”) is used to describe such a situation. But do you know where it comes from? It involves (涉及) Empress Ma (AD 1332 – 1382), wife of Zhu Yuanzhang (AD 1328-1398), the first emperor of the Ming Dynasty (AD 1368 – 1644).