First from Hohhot to Linfen to Pingyao and then from Pingyao to Yingxian to Datong. Of course, there are buses here, mainly depending on your economic level. It is not recommended that you take the night bus. Personally, I think it is more dangerous. Buses are more convenient and faster than trains. The account is not nearby, so it is not recommended to add it to this trip. There are five temples and one palace in Datong, namely Huayan Temple, Shanhua Temple, Huokeji Temple, Dijun Temple, Muslim Temple, Chunyang Palace, and of course Yungang Temple and Hengshan Hanging Temple. By the way, you can have a look at the Nine Dragon Wall. As for accommodation, it depends on your grade. I usually choose Home Inn and Jingjiang Star as my first choice for travel. If you don't mind spending these hotels, I can recommend others for you.