Time Traveling Brother and Sister

The story of an older, myopic leftover man and a leftover woman who traveled back in time to ancient times and became the son and daughter of a folk doctor. They became a pair of brothers and sisters who grew up together. The reality is not as good as modern people living in ancient times, and they even face a series of challenges and depend on each other. The two people in the story just have a pure brother-sister relationship, and there is no love. However, most of the others have gained love. The two lived, studied, and looked for a new way out in ancient times. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.