As early as the Shang and Zhou Dynasties, people began to wear jade ornaments, which not only displayed wealth and status, but also symbolized virtue. "Thinking of a gentleman, he is as warm as jade," "In ancient times, a gentleman must be accompanied by jade," "A gentleman does not part with jade without reason, comparing his virtue to jade." The five virtues of a gentleman - benevolence, righteousness, wisdom, law, and bravery - have thus become the definition of jade. The literati and elegant scholars of ancient China had an extremely profound understanding of the characteristics of jade and regarded jade as virtue. Xu Shen of the Eastern Han Dynasty pointed out in his book "Shuowen Jiezi": "Jade, the beauty of stone, has five virtues. Its luster and warmth represent benevolence; its veins visible from the outside reveal its interior, representing righteousness; its sound spreads far and wide, representing wisdom; it does not bend but breaks, representing bravery; its sharpness is not overbearing, representing law."