My Grandpa, the Party Member

Lu Guoqing lost his father when he was young, and the name he dreaded hearing most was that of his grandfather, Lu Yiming. During the War of Resistance Against Japan, Lu Yiming served as the director of a hospital at the Tangqiao Coal Mine, which was occupied by the Japanese invaders, and was branded a traitor. To wipe away the disgrace, Lu Guoqing's father, Lu Geming, joined the Sino-Vietnamese Border Self-Defense Counterattack and died a hero. Just as Lu Guoqing thought he was finally escaping his grandfather's shadow, he received a call from Southeast Asia one day. An old man named Fang Dan wanted Lu Guoqing's help finding records of his and Lu Yiming's entry into the Chinese Communist Party more than seventy years earlier...