The detention of Pema Wangjom Thongdok, an Indian national residing in the UK, at Shanghai airport has escalated diplomatic tensions between India and China. Thongdok was held for 18 hours last Friday while transiting from London to Japan via Shanghai. The reason cited for her detention was her passport listing Arunachal Pradesh as her birthplace, a region China claims as its own, referring to it as ‘South Tibet’—a claim India vehemently denies.