Do, T.K.C. et al. 2026. AN EXAMINATION OF READING TEXT DIFFICULTY IN THE VIETNAMESE NATIONAL HIGH SCHOOL GRADUATION CHINESE EXAM: EVIDENCE FROM THE 2025 TEST. Ho Chi Minh City University of Education Journal of Science. 23, SI2 (May 2026). DOI:https://doi.org/10.54607/hcmue.js.23.SI2.5578(2026).