Siheyuan: I eat melon while doing scientific research

Description

Gao Zhendong traveled through the world of "Siheyuan". When he arrived in Siheyuan, he was a young man with strong roots, strong body, good facial features, a military background, repeated military exploits, a university degree, technology in hand, sufficient cash, and a system close to him.
He has knowledge from his past life before time travel, has a system to provide material support, and occasionally draws more future wisdom.
He didn't want to be a fool all day long, thinking about trivial things like three melons and two dates. Instead, he wanted to contribute more in this hot and vibrant era. At least when he got old, he could say to himself: "In these two lives, , worth it.”