Enjoy Peace and Quiet

A class of frontier soldiers rode in armored vehicles to escort the latest technology field medical vehicles to the border to build a temporary field hospital. After passing through a tunnel, I traveled to a strange world. It was like ancient China, but it was not like any dynasty in history. Moreover, this was a time when war was raging and rebels were everywhere. Can this class of frontier soldiers and the three members of the medical team return to their original world? How should we find our own way to survive in troubled times?