"A piece of ice in a jade pot" means ice in a jade pot, which means honesty and integrity. My heart is as white and transparent as ice in a jade pot.

Source: Furong Inn broke up with Xin Jian.

Don Wang Changling

Cold rain at night, Wu,

Pingming Chugu Mountain in Fujian.

If relatives and friends in Luoyang ask each other,

A piece of ice is in the jade pot.

I came to Wudi on the night when the cold rain dripped all over the river. After seeing my friends off at dawn, I only left the lonely shadow of Chushan.

When I arrive in Luoyang, if any relatives and friends ask about me, please tell them that my heart is still as pure as the ice of a jade pot and has not been defiled by worldly things such as fame and fortune.

This group of poems was written in the first year of Tianbao (742) when Wang Changling was appointed as the county magistrate of Jiangning (now Nanjing). In the 15th year of Kaiyuan in Wang Changling (727), he was a scholar. In the 27th year of Kaiyuan (739), he went to Lingnan; He returned to the North the following year and served as Jiangning Cheng at the end of the year, still serving as an official. Xin gradually is a friend of Wang Changling. This time, he intends to cross the river from Runzhou (now Zhenjiang), take Yangzhou and go north to Luoyang. Wang Changling may accompany him from Jiangning to Runzhou, and then break up here. These two poems should be written for this time.

A word "loneliness" is like a fuse of feelings, which naturally leads to the last two parting words: "Luoyang relatives and friends are like asking each other, and there is a piece of ice in the jade pot." The poet held out a bright and pure ice heart from the glittering and translucent empty jade pot to comfort his friends, which can better express his deep affection for relatives and friends in Luoyang than any words of acacia.