MEA advises Indian nationals to exercise caution when travelling to or transiting through China after the 18-hour detention of Arunachal-born Pema Wangjom Thongdok at Shanghai airport on Nov 21
Incident involved Chinese officials invalidating her passport over Arunachal claims; India protested, calling it a breach of international travel rules and reasserting Arunachal's integral status
New Delhi demands Beijing's assurance against future harassment of Indians, aiming to preserve improving bilateral ties despite the row