SIJUN QIN. From "Dopamine Traps" to "Endorphin-Driven Growth" ——Design Logic, Scientific Foundations and Heilongjiang Implementation Roadmap of Screen-Free Study Tour Camps. Education Research on Study Tours and Practice, [S. l.], v. 2, n. 3, p. 9–13, 2026. DOI: 10.63944/wdrb03. Disponível em: http://ojs.iajournals.cn/index.php/erstp/article/view/386. Acesso em: 15 jul. 2026.