The 1970s: I Found a Future AI Brain at the Scrap Yard, and the Nation...

Jiang Wan travels to 1974 and becomes a “black-category” educated youth assigned to a salvage station.

While everyone else is miserable sweeping the streets, she finds a futuristic AI brain in a pile of scrap metal:

“Ding! Host detected in a technological wasteland. Activate ‘Civilization Leap’ mode?”

From then on, she turns junk into treasure:

✧ Rusty gears + broken wires = an ahead-of-its-time radio (she uses it to monitor enemy broadcasts and gets chased and scolded by the Revolutionary Committee)

✧ Scrapped lathe + kerosene lamp = precision machining device (military industry bigwigs beg her for the blueprints)

✧ Dead battery + chamber pot = simple nuclear radiation detector (enemy spies flee overnight, hauling a train with them)

Then one day...

The stone-faced officer Lu Chenzhou storms into the salvage station with a gun: “Comrade Jiang Wan, you are suspected of leaking state secrets. Come with me for questioning!”

Jiang Wan whips out a stack of blueprints: “Officer, the stealth fighter design you wanted... could I trade it for a ‘get-out-of-death-free card’?”

Later...

The military conference room erupts: “We have to protect this girl! Assign Lu Chenzhou to watch her around the clock!”

Lu Chenzhou: “...She took apart my watch in the middle of the night to make a signal transmitter. I can't do this job!”

[Tech-obsessed heroine x gruff-on-the-outside, soft-on-the-inside officer]

“Don't ask. It's patriotism, that's all! As for the AI brain? I taught myself from my family's heirloom, the Militia Handbook!”