Where is the Oriental Grand Port mentioned in Sun Yat-sen's founding strategy?

The first plan: the center of this plan is to build a big port in the north. The port is located in Bohai Bay, that is, between Dagukou and Qinhuangdao, between Qinghe Estuary and Luanhe Estuary, and between Dagukou and Qinhuangdao on the coastal headland. Its advantage is the nearest deep water point in Bohai Bay, which is not frozen in winter and has no river silt. It can be connected with inland waterways in North China and Central China, making it the largest salt-producing area in China. The Northwest Railway System started from Dagang in the north and consists of eight lines, from east to west, from south to north, extending to the northeast, north and northwest of China, and reaching the border. If the northwest railway system is completed and connected with the railway in Siberia, the northern port will become the nearest seaport in Central Asia and central Siberia. After the completion of the Northwest Railway System, firstly, it can immigrate to Mongolia and Xinjiang, develop large areas of uninhabited land and various natural resources there, and absorb all the population of the Yangtze River and coastal areas; Second, coal mines and iron mines in Hebei and Shanxi can be used to build large steel mills. The second plan: the center of this plan is to build the Oriental Port. According to Sun Yat-sen's plan, there are two plans for the port construction site. One option is to choose Hangzhou Bay, which is located between Zhapu Point and Ganpu Point. The advantages of building a port here are: first, the deepest part of Hangzhou Bay, about 40 meters, can berth the largest ocean-going freighter in the world at that time; Second, there is no river silt; Third, it belongs to undeveloped areas. All urban planning and transportation planning can be built with the latest methods, and there is full freedom to develop industry. Its vast surrounding area and cheap land provide a bright prospect for the future expansion of the city. In addition, the port has convenient connections with inland rivers, canals, lake water systems and railway systems. Therefore, Sun Yat-sen believes that if this port is properly developed, it will surpass Shanghai and become the largest commercial center in eastern China in a few years. Another option is to choose Shanghai. Shanghai has a special position in Sun Yat-sen's whole founding strategy. The biggest problem in Shanghai's construction of the Oriental Port is the siltation of the Yangtze River. If this problem can be properly solved, Shanghai can be built into an international metropolis. Therefore, the adoption of this scheme is very important for improving the Yangtze River system and dredging the river around Shanghai. As for how to harness the Yangtze River, Dr. Sun Yat-sen also put forward a detailed plan. From the offshore deepwater line, through the confluence of Huangpu River, Jiangyin and Wuhu, to Hankou, there are corresponding regulation measures, such as narrowing the estuary, building dikes, filling and blocking, or diverting traffic. While improving the Yangtze River water system, we will build inland commercial ports such as Zhenjiang, Nanjing, Pukou, Wuhu, Anqing, Poyang Port and Wuhan. Jiangnan belongs to a water town, so it is very important to develop waterway transportation according to local conditions. Therefore, in this plan, Sun Yat-sen proposed to improve the waterway system including the North Canal, Huaihe River, Jiangnan Waterway System, Poyang Waterway System, Hanshui Waterway System, Dongting Waterway System and the upper reaches of the Yangtze River, so that the commercial ports in the south of the Yangtze River can be linked and integrated. Building dams, ports and cities requires a lot of steel and cement, and from Zhenjiang to the west, there are abundant limestone and coal mines on both sides of the Yangtze River, which are important raw materials for manufacturing cement. Therefore, in this plan, Sun Yat-sen specifically proposed to build a number of large cement plants along the Yangtze River to meet the needs of construction.