Class Survival: I'm the Only Male in the Entire Train?

In an instant, all the subways around the world rushed off the tracks and fell into the endless darkness! [Welcome to the inner earth world, please drive your train and try to survive! Surface civilization was completely destroyed, ancient underground monsters awakened, and every subway station became a death zone. When intern Zhou Yang was desperate, he found that he had gained the highest control of this "Nursing School Special Train"! When other survivors were trembling in the broken carriage and killing each other to grab a bottle of dirty water, Zhou Yang has activated the [Car Upgrade] system! [Consume "Iron Ingots" x10 to transform Carriage No. 2 Into a "Simple Plantation"! [Consume "Monster Core" x5 to install an "Electromagnetic Defense Network" for Car No. 3! [Consume "Rare Blueprint" x1 to unlock the S-class carriage "Mobile Operating Room"! Outside the car, there are man-eating monsters and the darkness of human nature. In the car, Zhou Yang and dozens of gentle nurses and ladies gathered around the induction cooker to eat hot pot. "Brother Zhou Yang, today's vegetable salad is delicious~" "Classmate Zhou Yang, this is the physical recovery potion I just prepared. Drink it quickly." "Mr. Stationmaster, do you... Do you still need personal care services?"