** The protagonist is reborn, marries a single mother who works in a factory, and comes with a stepdaughter who is thin, dark-skinned, but extremely talented on the diving platform (refer to the background of Quan Hongchan). The family is too poor to open the pot, and the stepdaughter is about to be sent back by the provincial team due to malnutrition.
* The protagonist awakens to the "Great Country Craftsman System", but he doesn't want to build an aircraft carrier, he just wants to make money to support his daughter.
* In order to train his stepdaughter, he made a "fluid dynamics analysis pool" with scrap parts; in order to treat injuries, he prepared an "ancient medicinal bath".
* Reporter: "May I ask why your daughter's water-pressing technique is so perfect?"
* Protagonist (wearing vest and slippers): "Oh, I taught her to treat water as concrete, as long as it doesn't hurt when she hits it."
* **Cool point:** Behind the world champion who comes from a poor family, there is a hard-core dad who looks slovenly but actually possesses black technology.
