Yangtze Delta

The Yangtze Delta or Yangtze River Delta (YRD), once known as the Shanghai Economic Zone, is a megalopolis generally comprising most parts of Shanghai, southern Jiangsu, northern Zhejiang, and southern Anhui. The area lies in the heart of the Jiangnan region (literally meaning "south of the Yangtze"), where the Yangtze drains into the East China Sea. Historically, the fertile delta fed much of China's population, allowing cities and commerce to flourish. Today, it is one of China's most important metropolitan areas and is home to China's financial center, as well being as a tourist destination and a hub for manufacturing ranging from textile to automaking. In 2024, the Yangtze Delta had a GDP of approximately US$4.7 trillion (about the same size as Germany).

The urban buildup in the area has given rise to what may be the largest concentration of adjacent metropolitan areas in the world. It covers 350,000 km² (140,000 sq mi) and is home to over 240 million people, about a sixth of China's population. With a fourth of the country's GDP, the YRD is one of the fastest growing and richest regions in East Asia.

The Neolithic Liangzhu culture was based in this region, and in the Eastern Zhou period it was home to the powerful states of Wu, based in Suzhou, and Yue, based in the Shaoxing area. Nanjing first served as a capital in the Three Kingdoms period as the capital of Eastern Wu (AD 229–280). In the fourth century CE the Eastern Jin dynasty (AD 317–420) moved its capital here after losing control of the north and its capital Jiankang (present-day Nanjing) became a major cultural, economic, and political hub. During the mid to late period of the Tang dynasty (618-907), the region emerged as an economic hub, and by the late Tang the Delta became the Empire's foremost important agricultural, handicraft industrial and economic hub.

Hangzhou served as the Chinese capital during the Southern Song dynasty (1127–1279). Then called Lin'an, it became the biggest city in East Asia with a population more than 1.5 million, and one of the most prosperous cities in the world, which it remained after the Mongol conquest. At the same time, Ningbo became one of the two biggest seaports in East Asia along with Quanzhou (in Fujian province). Nanjing was the early capital of the Ming dynasty (1368–1644) and the region remained the most important economic region of the empire even after the Yongle Emperor moved the capital to Beijing in 1421.

During the mid-late Ming dynasty (1368–1644), the first bud of capitalism of East Asia was born and developed in this area, although it was disrupted by the Manchu invasion and controlled strictly and carefully by the Confucian central government in Beijing, it continued its development slowly throughout the rest of the Qing dynasty (1644-1911). During the Ming and Qing dynasties, the delta again blossomed into a large socioeconomic hub.

During the Qianlong era (1735-1796) of the Qing dynasty, Shanghai began developing rapidly and became the largest port in the Far East. From late 19th century to early 20th century, Shanghai was the foremost commercial hub in the Far East. The Yangtze Delta became the first industrialized area in China. In the middle and late feudal society of China, the Yangtze River Delta region initially formed a considerable urban agglomeration.

After the Chinese economic reform program which began in 1978, Shanghai again became the most important economic region in Mainland China. In modern times, the Yangtze Delta metropolitan region is anchored by Shanghai, and also flanked by the major metropolitan areas of Hangzhou, Suzhou, Ningbo, and Nanjing, home to nearly 105 million people (of which an estimated 80 million are urban residents). It is the heart of China's economic development, surpassing other concentrations of metropolitan areas (including the Pearl Delta) in China in terms of economic growth, productivity and per capita income.

In 1982, the Chinese government set up the Shanghai Economic Area. Besides Shanghai, four cities in Jiangsu (Suzhou, Wuxi, Changzhou, Nantong) and five cities in Zhejiang (Hangzhou, Jiaxing, Shaoxing, Huzhou, Ningbo) were included. In 1992, a 14-city cooperative joint meeting was launched. Besides the previous 10 cities, the members included Nanjing, Zhenjiang and Yangzhou in Jiangsu, and Zhoushan in Zhejiang. In 1997, the regular joint meeting resulted in the establishment of the Yangtze Delta Economic Coordination Association, which included a new member Taizhou in Jiangsu in that year. In 1997, Taizhou in Zhejiang also joined the association. In 2003, the association accepted six new members after a six-year observation and review, including Yancheng and Huai'an in Jiangsu, Jinhua and Quzhou in Zhejiang, and Ma'anshan and Hefei in Anhui. In 2019, the area expanded to include the entirety of Anhui, Jiangsu, Zhejiang, and Shanghai.