Which coastal city has the best geographical location?

It is generally considered as Shanghai. Shanghai has the largest Yangtze River basin (Central China) as its hinterland, and Guangzhou has the Pearl River basin (South China), which is also an irreplaceable hub.

However, Dalian, Qingdao, Xiamen, Quanzhou, Lianyungang, Zhanjiang, Beihai and other places are short of radiant energy, making it difficult to become metropolises. Yangzhou in the Canal Age and Shanghai in the Ocean Age. In terms of market role, Shanghai is the largest and most important gateway city in China. The starting point of this position is the geographical location of Shanghai. Regarding the role of geography as a basic factor, Braudel, a historian of the Chronicle School, once said: Geography can help people find the slowest structural truth and look forward to the future according to the longest path. History should follow its teaching and accept its classification and category. ?

Shanghai is the leader of the Yangtze River estuary. How many provinces and cities are there in the upper, middle and lower reaches of the Yangtze River? It accounts for almost two-thirds of China, and it is also the center of China, which is located in the north and south oceans. What a wonderful geomantic omen and treasure land. The state must develop it, so that China can develop and progress.

However, another view is that if coastal cities are considered objectively, the urban area of Shanghai is not in the coastal areas, but in the inland areas where the Huangpu River flows inland. Relatively speaking, it is not a real coastal city. Although its port is the largest in the world, it is 6-8 kilometers away from the urban area, 1 times higher than Shenzhen Port and Kowloon Kwai Chung Port, and several times higher than Kowloon Kwai Chung Port.

According to this view, the best geographical locations are Hong Kong and Shenzhen, because they are located in the South China Sea and are major international waterways. Singapore and Hongkong are thriving because of the South China Sea. Shanghai Baosteel is building a steel base in Zhanjiang, because Zhanjiang is closest to Brazil and Australia, which produce iron ore. In addition, it is very convenient for Guangdong coastal areas to import natural gas. Last winter, natural gas for heating in the north was in an emergency, and natural gas was transferred from Zhuhai gas storage station to the north. Although Shanghai has a vast hinterland, it lacks deep-water ports. The so-called Yangshan Port was built within the jurisdiction of Zhoushan Islands in Zhejiang Province.

which major coastal open city has a better geographical location? Shanghai or Hong Kong and Shenzhen? What's your opinion?