Hou, hui, and F. Qu. “A Study on The Relationship between Vocabulary and HSK Levels in Thai Elementary Chinese Textbooks ——Take Ren Jingwen’s ‘Elementary Chinese (I)’ as An Example”. Journal of China-ASEAN Studies, vol. 5, no. 1, Dec. 2024, pp. 62-73, https://so07.tci-thaijo.org/index.php/JCAS/article/view/6187.