China, ancient Beijing, Nanjing, Tokyo and Xijing are all present positions. Their explanation is as follows. Many people think that it simply refers to the city, but it is not like this. They didn't mention any cities. They also refer to different cities in different dynasties. During the Qing Dynasty in ancient China, people generally practiced the multi-Beijing system. A regime can have many capitals, called Beijing. There are two and four or five. Beijing has a long history, but its history is not long. In ancient times, Beijing did not refer to Beijing now, nor the capital, but only the capital. The capital of the Tang Dynasty was Xi 'an Yitai Square, which was originally Beijing, mainly because Taiyuan was the land of Tang Li and strategically important. After the Five Dynasties, the Tang Dynasty continued to this day, which was too far away from Beijing, but their capital was not Taiyuan, but Kaifeng. The famous residence in the Northern Song Dynasty was Beijing, which was upgraded to Beijing mainly because Song Zhenzong stayed here. After the demise of the Liao Dynasty, Chifeng, Mongolia was regarded as Beijing, but later Jin was unified and Tokyo was regarded as Beijing. In the Ming Dynasty, Nanjing was its capital, and Kaifeng in the north was Beijing. At the end of the Qing Dynasty and the beginning of the Ming Dynasty, Beijing was always the capital, but in the Republic of China, Beijing was restored to Peiping and changed from Zhu Yuanzhang to Beiping as the national name. After the founding of New China, Beiping was the capital and changed to Beijing, which is now its name. Nanjing is similar to Beijing, and its history is uncertain. Nanjing was first named in the Tang Dynasty. After the Anshi Rebellion in Chengdu, Emperor Xuanzong of the Tang Dynasty fled to Chengdu and changed it to Nanjing. At the end of the Tang Dynasty, Liaoyang returned to Beijing to Kaifeng, and its southern part was the capital, so Kaifeng was also called Nanjing. At the end of the Yuan Dynasty, Nanjing was also called the capital. Later, it moved to Beijing and kept its name, also called Nanjing. After the demise of the Ming and Qing Dynasties, Nanjing was abolished. When the prisoners were released in the Republic of China, China was restored and its title was restored, so Nanjing was called Nanjing City. Tokyo's reputation is also very high, but it is uncertain. The earliest Tokyo was in the Zhou Dynasty, and it was called Tokyo in Xi 'an. Now Xi 'an takes Luoyang as Tokyo, which means Xi 'an Chang 'an. In addition to Wu Zetian, Xi 'an takes Luoyang as Tokyo, and Xijing is not sure. Today, after Xi 'an moved its capital to Luoyang, almost like the Han Dynasty, Xi 'an is the city of Xijing. After his Chang 'an perished, Luoyang was the capital and Chang 'an was Xijing. So ...