The term CITY IN THE TONKIN REGION is referring to Hanoi, the capital of Vietnam. Hanoi is a five-letter word and is located in the northern part of the country in the Tonkin region. It is the second largest city in the country and is known for its rich culture and history. The city is home to many historical sites, including the Temple of Literature, the Imperial Citadel of Thang Long, and the Ho Chi Minh Mausoleum. Hanoi is also a popular tourist destination, offering a variety of attractions, restaurants, and shopping opportunities.