Imperial examination + time travel + fetal wear + farming + childhood sweetheart
No space, no system, steady flow of struggle
The male protagonist is single-minded, and the CP is from one point to the end.
Zhou Yan, a graduate student in the Department of Modern History, died suddenly while staying up late to sort out ancient books. When he opened his eyes, he became a newborn baby in the Jiangnan water town of the Jing Dynasty. He was born as the third son of the Zhou family, a farmer. The family had five acres of thin farmland and two thatched huts, with an older brother and a younger sister. His life was poor but warm.
