Reborn: Just How Many Sweet Sisters Do You Have?

[Period + Patriotism + Alien Civilization + Hidden Family] Qin Xiaonian, a water conservancy expert, resolutely blows up the dam he designed and built, and is reborn in the winter of 1976. That day, his mother abandons his newborn baby sister... Later, he somehow gains a few more younger sisters, and then a few more... Qin Xiaonian takes a bullet but survives. Yet he seems to have developed acquired savant syndrome, gaining abilities he never had in his previous life. Besides medicine, he turns out to have a knack for the underworld. His greatest medical skill is treating impotence. Sigh... Alien genes have been embedded in Qin Xiaonian's body, and he throws himself wholeheartedly into helping Huaxia change lanes and overtake its rivals.