He Yuyang: The tough eldest brother of the courtyard house

A modern youth, unable to accept the ending of the novel "Full House of Love," travels back in time and becomes He Yuyang, the eldest son of He Daqing, in a courtyard house in 1942—a child who never appeared in the original story. Although the courtyard house at this time is not as full of scheming as it is in the later part of the novel, it is still rife with the friction of family life and is shrouded in the pressure of survival in a turbulent era.
He Yuyang knew that his mother, Liu Yan, would suffer a difficult childbirth in 1944 when she gave birth to his younger sister, He Yushui, leaving her with health problems and causing her to die young. This became his first priority after transmigrating. With the help of his foresight, a sign-in system (allowing him access to pre-21st-century technology and weapons), a vast spiritual spring space (for planting, animal husbandry, time acceleration, and storage), and a set of martial arts manuals, he began to proceed cautiously: