Study on En-fu Cheng's academic thought Study of Fei Xiaotong's academic thoughts Study on Chen Zheng's economic thoughts Study on Lenin's strategic thought 并列题名:Study of Fei Xiaotong's academic thoughts Research on Shen Zhiyuan's academic thought New study on He Lian-cheng economy thought Research on Zhang Daoyi's academic thought Research on Zhang Qiyu's academic thoughts Qian Xuesen's Academic Thought