SUWANTHANIN , W. Closed-Door Policy of the Qing Dynasty and China’s Defeat in the First Opium War . Journal of ASEAN PLUS Studies, [S. l.], v. 3, n. 2, p. 1–12, 2022. Disponível em: https://so06.tci-thaijo.org/index.php/aseanplus/article/view/260427. Acesso em: 20 sep. 2026.