A piece of ice heart in the jade pot means "My pure heart will stay in the crystal clear jade pot forever" and "A piece of ice heart in the jade pot" is a famous sentence in the poem "at hibiscus inn parting with xin jian" by Wang Changling, a poet in the Tang Dynasty.

This poem was written in the first year of Tianbao, and Wang Changling was demoted to Jiangning Cheng. Xin gradually is a friend of Wang Changling. This time, he plans to cross the river from Runzhou, via Yangzhou, and go north to Luoyang. Wang Changling may accompany Xin gradually to Runzhou first, and then enter Henan to Luoyang.