This essay focuses on an interpretation of Marxism from a Chinese intellectual- La Da. Li had believed Marxism during the May Fourth movement. This essay points out how he explained Marxism and answered problems in Modern China through Marxism. Furthermore, this essay compares the interpretation of Marxism of Li Da with another Chinese intellectual- Chen Duxiu. These two intellectuals had their own political positions, and also had different understanding in Marxism. The differences between Li and Chen show the complexity and multiplicity of "Marxism" in China.