LE, Chi Nghia; TRAN, Thi Kim Loan. CHINESE TONE TEACHING CHALLENGES FOR VIETNAMESE STUDENTS: INSIGHTS ON VISUALIZATION TOOLS. Ho Chi Minh City University of Education Journal of Science, [S. l.], v. 22, n. 8, p. 1507–1517, 2025. DOI: 10.54607/hcmue.js.22.8.5009(2025). Disponível em: https://journal.hcmue.edu.vn/index.php/hcmuejos/article/view/5009. Acesso em: 7 mar. 2026.