Courtyard House: Ten-year-old Master Zhu reorganizes the entire courtyard

Reborn in 1945, I became ten-year-old He Yuzhu.
All he had was a white flour bun; inside was his mother dying in childbirth; outside were Japanese bayonets and a yard full of "good neighbors."
But this time, it's different.
A new "Fate Choice System" has appeared in my mind. It doesn't give me any powerful weapons; it simply presents me with cold, hard options whenever I reach a crossroads in my destiny:
A: Go find your father. Risk: Encounter a Japanese patrol, probability 70%.
B: Trust your neighbor. Risk: 100% chance of losing everything.
C: Venture out alone. Risk: Death. Potential benefit: [A futuristic scene: A woman in a white coat hands you a box of penicillin.]
I chose C.
From then on, at the age of ten, I embarked on a different path.
From snatching his mother's life back from under the noses of the Japanese puppet regime to fighting for survival amidst the Kuomintang's "plundering" frenzy; from becoming the most insidious "nail" on the underground front to protecting his family from sinking through successive storms of history.
Yi Zhonghai, Jia Zhangshi, Xu Damao... you can go have fun on your own.
He Daqing, you can forget about running off with a widow in this lifetime.
My battlefield has long since expanded beyond this courtyard house.
This is the story of a family who started in a Beijing alley in 1945, navigating war, turmoil, and change, ultimately becoming a legend of their time. Please note that this story is purely fictional; any resemblance to actual events or persons is purely coincidental.