Explanation: Deepest winter, know the evergreen pines and cypresses. Only after a severe test analogy in order to see a person's quality. Source: "The Analects of Confucius Zaihan": "cold of winter, and then withered after the known pine also." Examples: ~ When the Korean elections, loyal heart to offer Kwai profile. (Ming Wang Shizhen "Ming Fung Kee" sixteenth out)