The Imperial Palace, also known as the Forbidden City, was the imperial palace of emperors in the Ming and Qing Dynasties. It is located at the centre of Beijing. The construction began in the 4th year of the reign of Yongle Emperor (1406) in the Ming Dynasty, and completed 14 years later (1420). There were 14 emperors in the Ming Dynasty and 10 emperors in the Qing Dynasty had been enthroned and ruled here.

Ming TaiZhu明太祖 Zhu YuanZang朱元璋（１３２８～１３９８）: the first emperor of Ming明。
Jian WenDi建文帝Zhu YunWen朱允炆 （1377～1402？）:namely Ming HuiDi明惠帝。For the Prince Zhu Biao朱标 died in 1392, So Zhu YuanZang朱元璋 let the prince's second son, his grandson Zhu YunWen朱允炆 take the throne. Zhu YunWen朱允炆's reign began in 1398. after "Rebellion of JingNan靖难之变"disappeared.

Yong LeDi 永乐帝Zhu Di朱棣（1360～1424）：namely Ming ChengZhu明成祖。The fourth son of Zhu YuanZang朱元璋。In 1399,he started a rebellion, called "Chang of JingNan靖难之变",captured the throne of Jian WenDi建文帝.In 1403,he changed the reign title JianWen建文 to YongLe永乐.

NanJing南京：the provincial capital of JiangSu江苏， called the ancient capital of six dynasties for it have been the capital in six dynasties, namely Song宋,Qi齐, Lian梁, Chen陈, Southern Tang南唐,Ming明,TaiPing太平天国,Republic of China中华民国. 

（subtitle：Li ZhiGang李至刚,smart character, first advised choosing BeiPing北平 for the capita李至刚，为人敏给，首发建都北平议)

The Emperor YongLe永乐皇帝 was very glad to issue a edict choosing BeiPing北平 as the second capital called BeiJing北京 in a few hours.

（subtitle：God regard life as the most important. A emperor should go after the god, look loving the people as the most important. Only one couldn't administer the country so wide, should choose the talents to help. Everyone tries his best to benefit for the people.上天之德，好生为大。人君法天，爱人为本。四海之广，非一人所能独治。必任贤择能，与之共治。各尽其道，为民造福.)

The Emperor YongLe永乐皇帝 just enthroned showed his thoughts on how to administer the country in the edict

（subtitle：The Emperor YongLe永乐皇帝）

From the historic materials presently, ZhuDi朱棣 in 1430 was sensitive and uneasy. As a emperor just seized the scepter from his nephew, there were many troublesome problems before him. The slaughter to the emperor Jian WenDi建文帝's ministers against him was still going on.

After killing many people, ZhuDi朱棣 felt very uneasy, ask RuChang茹常, one of his ministers:"Would that I had done offend the heaven , the earth and the ancestor?"

He felt more uneasy that his nephew the emperor Jian WenDi建文帝 disappeared in a big fire when NanJing南京 was invaded. Although he gave his nephew a royal funeral, but many historians thought in the grave was not the emperor Jian WenDi建文帝 himself. The emperor Jian WenDi建文帝 most impossible ran abroad. This was ZhuDi朱棣 most worried.
Then, one day, ZhuDi朱棣 going to the court, was almost assassinated by JingQing 景清one of the ministers.From then, he always dreamed nightmares. He might more intensely miss his old haunt BeiPing北平.

（subtitle：remains of Ming's Imperial Palace in NanJing南京明皇宫遗址）

Standing in the middle of the remains of Ming明's Imperial Palace in NanJing南京, it was not difficult imagining The Emperor YongLe永乐皇帝 had lived in the North, mightn't more and more like NanJing南京, began planning to change the first capital to BeiJing北京.

In May of that year, he in the court said to the ministers:" BeiJing北京 was my fief。There are the god of the land and the god of grain, should be used the ceremonial system as the national 's capital." The ministers were violently against the suggestion.

From then, ZhuDi朱棣 became cautious, began circuitously preparing for changing the capital in secret.

In 1403, in the city called just from BeiPing北平 to BeiJing北京 suddenly appeared many southern people from JiangZhe江浙. The court permitted they would exempt from taxation for five years as soon as moving into BeiJing北京. People moved into BeiJing北京,were generally rich. They quickly went into trade. At then, there appeared many peasants cultivating the lands at the outskirts of BeiJing北京. The large-scale project of emigrants had began.

AT then, at the North-west grassland more than five thousand miles away from BeiJing北京, formidable Mongol cavalry army had began going ahead towards the Central Plains, threatening the north of Ming Dynasty明朝.

ZhengHe郑和(1371-1435)：one of the most well-known Chinese mariner and explorer and fleet Admiral, who made the voyages collectively referred to as the travels of "Eunuch Sanbao to the Western Ocean三保太监下西洋" or "Zheng He to the Western Ocean郑和下西洋", from 1405 to 1433. which predated the Westerners' Voyages of Discovery by almost a century.

The number of his voyages varies depending on the method of division, but he travelled at least seven times to "The Western Ocean" with his fleet. He brought back to China many trophies and envoys from more than thirty kingdoms -— including King Alagonakkara of Ceylon, who came to China to apologize to the Emperor.

anJing燕京: namely BeiJing北京。
FengSui风水：the location of a person's house or ancestral grave, supposed to have an influence on the fortune of a family and his offspring。

Guihai癸亥：Chinese traditional calendar，namely 1914.
"Ming Factual Recorde明实录":the historical book wrote in Ming明.

GengZi庚子：Chinese traditional calendar，namely 421.
Door Wu午门: the main door of the Forbidden City紫禁城.

Ming RenZong明仁宗 Zhu GuaoZhi朱高炽（1378－1425）：Emperor YongLe永乐's first son, took the thorn in 1424. After 10 months, died of a diease in 1425.

Ming XuanZong明宣宗 Zhu ZhanJi朱瞻基(1398-1435): Ming RenZong明仁宗's first son, took the throne in 1425, died in 1435.

Ming YingZong明英宗 Zhu QiZhen朱祁镇(1429-1467): Ming XuanZong明宣宗's first son, took the throne in 1435, died in 1467.