According to Baidu map query, it takes 6 hours and 30 minutes to drive from Xi 'an to Jinzhong, passing through Beijing-Kunming Expressway and Taiyuan Second Ring Expressway. The whole journey is about 595.7 kilometers.
The journey between the two places is about 647.6 kilometers, and it takes 14 hours 1 1 minute without taking the expressway.