INTRODUCTION OF PH.D THESIS BY DAO THI HA NINH “CHARACTERS ON POSITIONS AND DIRECTIONS IN MODERN CHINESE, AND THEIR VOCABULARY, GRAMMAR EQUIVALENTS IN VIETNAMESE”. Journal of Foreign Language Studies, [S. l.], n. 07, p. 66–68, 2024. DOI: 10.56844/tckhnn.07.310. Disponível em: http://journals.hanu.edu.vn/index.php/tckhnn/article/view/310. Acesso em: 15 jan. 2026.