Traveling with a dog

Between the two city, you need to make a transfer in Hohhot for a bullet train to Beijing.

For Hohhot - Beijing section, you need to check in the dog, which means your dog will not travel with you, but alone in another carriage or even another train.

I'm not sure about Ulanbaatar - Hohhot international train. I've never seen others travelling with a dog. And you need Quarantine Certificate, Certificate of vaccination, electronic chip on the dog to bring it into China. It's quite troublesome.