Literally ninety-nine percent; most likely; almost certainly. Indicates that something is highly probable or that a substance is nearly pure.

Jiucheng Palace, a famous Tang dynasty summer palace located in modern-day Linyou County, Shaanxi Province

Famous Tang Dynasty stone tablet inscription from 632 AD, written by Wei Zheng and calligraphed by Ouyang Xun in regular script, often referred to as [[九成宫|九成宮|jiu3 cheng2 gong1]]; it commemorates the discovery of a spring at the Jiucheng Palace