请阅读以下英文文章，梳理重庆历史上四次大规模的建城史，用时间轴的方式进行展示。

Chongqing: Journey to New Accomplishments

 

With a recorded history of over 3,000 years, Chongqing is the birthplace of Bayu Culture. It has undergone construction four times.

In the 11th century B.C., King Wu of Zhou (周武王) granted Ba area to a member of the royal clan with the family name Ji (姬). Its territory encompassed south Shaanxi Province, west Hubei Province, northwest Hunan Province, north Guizhou Province, and east Chongqing. The Ba people ( 巴人 ) were sincere and loyal to friends. They were also arduous and industrious, shrewd and brave, and good at singing and dancing. They were mainly engaged in farming, hunting, fishing, copper smelting, paint producing, wine brewing, salt trading, etc. In their long-term production activities, they created the unique Ba culture. 

 

In 316 B.C., the Emperor of the Qin State, Qin Hui Wang(秦惠王), commanded Zhang Yi i(张仪) and Sima Cuo （司马错）to annihilate Shu State (蜀国) and Ba State（巴国）. Following this, in 314 B.C., Qin State established Ba Prefecture (巴郡)  in the former territory of Ba State. Seeking to secure the salt spring, Zhang Yi strategically chose to construct Jiangzhou City(江州) at the confluence of the Yangtze River and the Jialing River, creating a new local government for Ba and a logistical base for future attacks against the State of Chu（楚国）. This marks the beginning of the construction of Chongqing City in history.

 

In 226, Li Yan, a military general of the state of Shu Han during the Three Kingdoms period, moved his troops to be stationed at Jiangzhou City. It was during this time that Li Yan spearheaded the second construction of Jiangzhou City.

 

During the Jin and Southern and Northern Dynasties, Chongqing underwent significant changes in its administrative boundaries due to national divisions and frequent warfare. This period saw the successive establishment of Jingzhou (荆州) in 311, Bazhou (巴州) in 553, and Chuzhou (楚州) in 557.

 

In 583, during the Sui Dynasty, Chuzhou (楚州) was renamed Yuzhou (渝州). The name "Yu," now the abbreviation for Chongqing, was derived from the ancient name of the Jialing River, known as "the Yushui River."

 

In 1102, during the late Northern Song Dynasty, Yuzhou was further renamed Gongzhou (恭州). Then, in 1189, Zhao Dun, who would later become Emperor Guangzong of the Southern Song Dynasty(宋光宗), ascended the throne in this region. Taking advantage of this "double joyous occasions (Shuang Chong Xi Qing in Chinese Pinyin)", he set up "Chongqing Fu" （重庆府）here. That is how Chongqing got its present name more than 800 years ago. The Southern Song Dynasty elevated Chongqing's significance in Chinese history, while Chongqing itself remarkably contributed to preserving this dynasty.

In order to fight against the Mongolian army, Peng Daya strengthened the defense by building the city walls around Chongqing. This endeavor is recognized as the third major construction project in Chongqing's history.

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Towards the end of the Yuan Dynasty, frequent wars badly damaged the city walls and moats. This not only weakened military defense but also made life difficult for people and slowed down economic growth. In 1371, during the early Ming Dynasty, commander Dai Ding initiated the fourth construction of Chongqing. The city built by Dai Ding was a stone city with 17 gates, of which 9 could be opened and 8 could not. This design symbolized Dai Ding's intention: the 9 open gates represented "nine palaces" (九宫), while the 8 closed gates represented "eight diagrams" (八卦) . Together, they symbolized "nine palaces and eight diagrams" (九宫八卦阵), an ancient Chinese theory from Yi-ology. This design reflected Dai Ding's desire for everlasting stability in Chongqing.

In 1891, Chongqing became China’s first inland port city open to the outside world with the establishment of Chongqing Customs.

In 1929, Chongqing was officially established as a municipality.

In eight years and five months after November 1937, Chongqing was the wartime capital of China.

On November 30, 1949, Chongqing was liberated.

On March 14, 1997, a new Chongqing was born when the Fifth Session of the 8th National People's Congress approved it as the fourth provincial-level municipality. On June 18, Chongqing Municipality was established officially.