List of former national capitals

Columns: Old capital city | Country | Today a part of | From | Until | Change , reason
Kaifeng | Song dynasty | China | 960 | 1127 | moved to Hangzhou | Hangchow ( Hangzhou ) | Song dynasty | China | 1127 | 1279 | Kublai Khan integrated China into the Mongol Empire | Nanking ( Nanjing ) | Ming dynasty | China | 1368 | 1421 | moved to Beijing | Nanking ( Nanjing ) | China , Republic of | China | 1928 | 1937 | moved to Chongqing because of Japanese occupation | Chungking ( Chongqing ) | China , Republic of | China | 1937 | 1945 | moved back to Nanjing | Nanking ( Nanjing ) | China , Republic of | China | 1945 | 1949 ( de facto ) | moved to Taipei after the loss of the mainland which caused the nationalist government fled to Taiwan and made Taipei the temporary capital of the Republic of China . Beijing was proclaimed the capital of the People 's Republic of China | Hakodate | Republic of Ezo | Japan | 1868 | 1869 | Annexed by Japan

Example questions:
What is the area of the city that was the former national capital of the Qin dynasty in East Asia from 221 BC to 206 BC ? | Which region is the city that was the former national capital of the Ming dynasty in East Asia from 1368 to 1421 situated ? | Which plain is the city that was the former national capital of the Han dynasty in East Asia from 206 BC to 25 on ? | Which rivers is the city that was the former national capital of the Han dynasty in East Asia from 25 to 220 on ?

Answers:
10,213 square kilometres | Yangtze River Delta | Guanzhong Plain | Luo River and Yellow River