Wang Changling's poem "Lotus Inn and Xin Jian Parting" in the Tang Dynasty: When it is cold and rainy at night, the civilians send guests to Chushan alone. Friends, if my friends in Luoyang invite me; Just say I'm still Bing Xin Okho, and stick to my faith! The "Bing Xin" here is a metaphor for being cheerful and pure. "Jade pot" is a pot made of jade, which means nobility. When Wang Changling sent Xin Xian to Luoyang, he said to him: If relatives and friends in Luoyang ask about me, please tell them that my bright heart is like ice in a jade pot, crystal clear and flawless. The poet uses the metaphor of "Ice Hu Xinyu" to show that he is aboveboard, honest and self-controlled, and has a good appearance. Now people sometimes quote "there is a piece of ice in the jade pot" to express noble interests.