Rachapan, Pattaraphon, Pornpawis Lhapeerakul, and Kanchaporn Siriwat. 2026. “The Development of a Learning Model Using the PPP Technique Integrated with the ‘Fun Mystery Box’ to Enhance Motivation in Learning Chinese Among Grade 4/5 Students at Chongfah Xinsheng Wanishbamrung School”. Vacana Journal 14 (1). Chiang Rai, Thailand:e140107. https://so19.tci-thaijo.org/index.php/VacanaJournal/article/view/2457.