It is a refreshing novel, telling the story of the female protagonist Wen Muluo and her Taoist companion and male protagonist Wen Muzhi (not brother and sister) who chose to go to another world to find opportunities to break through because their realm was at a bottleneck.
The male and female protagonists transformed into children and went to another world.
What? You said the male and female protagonists look very small? But they are already thousands of years old and have children!
What? You said they both looked so weak that they would fall down at the first push? But they are almost becoming gods!
What? You said they were penniless jingle? But their gold, silver and jewels can build a city!
Intent: Probably a purely refreshing article