To really understand today's tensions in the Taiwan Strait, we need to go back to a UN resolution adopted in 1971. UN Resolution 2758 recognized the People's Republic of China as the only legitimate representative of China to the United Nations and Taiwan is a province of China. Yet in the decades that followed, this principle was quietly hollowed out in the United States. The US has played a careful balancing act: acknowledging One China in words, while steadily eroding it in practice. Congress

In 1958, during what’s known as the Second Taiwan Strait Crisis, China fired over 450,000 artillery shells at Kinmen in just 44 days. After that crisis eased, China said it would continue shelling Kinmen for 20 years. But they only attacked on odd-numbered days of the week, with shells containing propaganda leaflets. The underground shelters left behind serve as a reminder of Kinmen's time as the front line of the conflict between Taiwan and China. Watch the full story on Kinmen and its undergro