I Transmigrated Back to the War of Resistance, and the System Told Me to Stay Alive

The protagonist, Chen Ye, spends three days and three nights at home watching documentaries about the War of Resistance, then accidentally drops dead. When he wakes up, he discovers that he has transmigrated to the period of the War of Resistance and unlocked the War of Resistance System. The System's mission requires him to survive until the founding of New China in 1949. In this dangerous and turbulent era, Chen Ye's story begins to unfold.