She has prosopagnosia and can only identify her husband by his blue shirt. But her husband, Zhou Suhui, came to Beijing for Concubine Bai Yueguang and disliked the green shirt and changed to black. When he came back, his wife Yishui was already holding another man in a green shirt, and the two were in love. Zhou Su thought back and proved that he was the husband, but no one believed him - because the man did everything he had not done in three years, chopping firewood and cooking. What's even more amazing is that Yi Shui can't recognize faces, only Qing Shi. Zhou Suhui lost his wife's token with his own hands, and now he no longer has the qualifications to prove his identity. He watched his wife laughing in someone else's arms, and finally understood that some things would never come back if they were lost.
