How many years was Liu Kun sentenced in Yangxian County?

It is not clear how many years Liu Kun was sentenced in Yangxian, because it was a long time ago and the trial was held in private.

Yangxian County is located in the southwest of Shaanxi Province, on the eastern edge of Hanzhong Basin, with Qinling Mountains in the north, Bashan Mountain in the south, Foping and Shiquan County in the east, Xixiang County in the south, Chenggu County in the west, Liuba County and Taibai County in the north. The geographical coordinates are10711'~10833', 33 02' ~ 33 43' north latitude, about 56 kilometers wide from east to west and 7 6 kilometers long from north to south. The Han River runs through it from west to east, and the Western Han Expressway, National Highway 108 and Yang 'an Railway pass through it. The total area of the county is 3206 square kilometers. It has a long history and culture, rich natural resources, convenient transportation and broad development prospects. It was called "Pearl of Han Dynasty" in ancient times, but now it is called "hometown of Zhu".