The stone tablet is engraved with the words "serving the people" mentioned in the celebration of the 70th anniversary of Northeast Li Dian University. In the History Museum of Northeast Li Dian University, there is a hand-carved wooden plaque with the five characters "Serve the People" written on it. The time is 1949 August 15, and the signature is the first graduate. Time is like a river, and years are like a hook. Wind, frost, rain and snow have printed 70 annual rings on this wooden plaque-2019.