If you choose between Chengdu and Chongqing and Xi 'an, where would you rather go?

Chengdu. Chengdu has many historical sites and a strong sense of modern city. There are many natural landscapes, cultural landscapes and delicious food, so it is easy to have a rest.

The mountain city of Chongqing has a great influence on traffic. Anyway, it is normal to climb mountains and walk a lot. The food is ok.

There are not many scenic spots in Xi 'an, except Terracotta Warriors and Huashan Mountain, and there are no attractions that attract me for the time being.