This chapter, I believe, is to commemorate the new serialization. The story is what if version of Jiang Hee in this universe returns to her prior period, then given the option to start again in modern era, with the distinction being Jiang He already has pre-modern era education, therefore the flow of the story will be different
Worry not, it will return to its previous story in the following chapter. Remember to check the Related tab regularly in the manga title to make sure you read a new serialization scanlated by
Paragon Scans
edit:
You can check the title is already in MangaDex. They introduce new characters that are not Jiang He and Xu Qing but based on them with switched personality