Then Li Hao still has a big plan to make, but it takes time, and he needs to personally investigate before he can formulate it, and many things may hit a wall in this era if they are implemented according to the memory of later generations. So Li Hao finished inspecting the West Lake, and immediately rushed to the Qiantang River with Fang Er, where there is also a big project to be done, that is, the Qiantang Haitang that resists the Qiantang tide.

Qiantang tide refers to the tidal phenomenon that occurs in the Qiantang River basin and causes the ocean water surface to rise and fall periodically due to the gravitational force of the moon and the sun. The tide of the Qiantang River is a natural wonder of the world, which is caused by the centrifugal action of celestial gravity and the rotation of the earth, coupled with the special topography of the horn mouth of Hangzhou Bay.

On the eighteenth day of August of the lunar calendar every year, the tide of the Qianjiang River is the largest. When the tide comes, the sound is like thunder, and the mountains and seas are overwhelming, which is magnificent. "The eighteenth tide of August is spectacular in the world." This is the famous sentence of the great poet Su Dongpo of the Northern Song Dynasty praising the autumn tide of Qiantang.

The Northern Song Dynasty poet Pan Lang has a poem that wrote: Long memories of watching the tide, Manguo people compete for the river to look up. The sea of suspicion is empty, and the drums are beating on all faces. The tide stands towards the waves, and the red flag is not wet. Don't look at it in a dream, the dream is still cold. This poem is a true portrayal of the activities of "making the tide" and "watching the tide" in those years.

The cross tide is 55 kilometers away from Hangzhou Bay, and there is a place called the big gap, which is an excellent place to watch the cross tide. Due to the long-term sediment accumulation, a sandbar is formed in the river, and the tidal wave from Hangzhou Bay is divided into two streams, namely the east tide and the south tide, and the two tide heads cross each other after bypassing the sandbar, showing the spectacular scene of "the sea surface thunders gathering, and the waterfall in the center of the river is horizontal".

The first line of tide is a white line on the foggy river surface, which moves westward rapidly, just like "practicing the Hengjiang River, and raising the white rainbow on the flat sand". The turning tide is the tide that goes upriver from Yanguan and will reach the next tide-watching spot, the old salt barn. The tide of the sea will bring all kinds of damage to the people in the vicinity every year, so the ancients built sea ponds in these places.

Tangjiang Haitang, also known as Zhejiang Haitang, is one of the great water conservancy projects in Zhejiang Province in ancient times. It is 300 kilometers long and 6-7 meters high, of which the north bank is 160 kilometers long from Hangzhou to Pinghu Jinsi Niang Bridge, and the south bank is 157 kilometers long from Xiaoshan Mountain to Shangyu Xiagai Mountain. The sea pond was built in Qin.

In the first year of Tang Kaiyuan, the Yanguan area was rebuilt, called the sea pond, which was originally an earthen pond. Later dynasties have been built, the north shore of the sea pond is mostly made of stones, the cross section of the pond body is trapezoidal, the stones are fixed with iron shovels and iron ingots, and the back is thickened with soil consolidation. The ancient sea pond in the area of Yanguan Town, Haining is now well preserved.

The sea pond, which was originally going to be rebuilt in the Kaiyuan period, was advanced by Li Hao's plan, which is also a big project for the benefit of the country and the people, but this is a completely costly livelihood project with no income. Li Hao wants to make this place because this place is harmed by the tide every year, which is very detrimental to the development of Hangzhou, and he is even more afraid of being used by some well-intentioned people.

After inspecting here, Li Hao and Fang Er rushed to the Shanghai area in the later generations. In the Shanghai area, the Spring and Autumn Period belongs to Wu. The Warring States period successively belonged to Wu Yue and Chu. After the Qin and Han dynasties, it was divided into Haiyan, Youquan and Louxian counties. In the ten years of Tang Tianbao, Wu County Taishou set up Huating County, and Shanghai began to have relatively independent administrative divisions.

The jurisdiction of Huating County is about the south of the Wusongjiang Ancient Road in the present-day Shanghai area, and the area west of the Chuansha-Huinan-Datuan line. During the Northern Song Dynasty, the mainland of Shanghai was divided into Huating County and Kunshan County, and the Chongming area belonged to Haimen County. Jiading County was established in early December of the tenth year of Jiading in the Southern Song Dynasty, and there were two independent administrative divisions in Shanghai.

In the fourteenth year of Yuan to Yuan, Huating County was promoted to the government, and the following year it was renamed Songjiang Mansion, and Huating County was still subordinated to it. In the 29th year of the Yuan Dynasty, Shanghai County was also under the jurisdiction of Songjiang Prefecture. In the late Yuan Dynasty, there were 2 prefectures of Songjiang Prefecture and Jiading, Chongming and Huating and Shanghai in Shanghai. By the end of the Ming Dynasty, there were Songjiang Mansion and its Huating, Shanghai, Qingpu 3 counties, Suzhou Prefecture Jiading, Chongming 2 counties, Jinshanwei. In the fourth year of Yongzheng in the Qing Dynasty, there were 8 counties of Huating, Shanghai, Qingpu, Lou, Fengxian, Fuquan, Jinshan and Nanhui in Songjiang Prefecture, and 2 counties of Jiading and Baoshan in Taicang Prefecture.

By the tenth year of Jiaqing, the Shanghai area has basically formed a pattern of 10 counties and 1 hall, including 7 counties of Songjiang Fuhuating, Shanghai, Qingpu, Lou, Fengxian, Jinshan, Nanhui and Chuansha Fumin Hall, and 3 counties of Jiading, Chongming and Baoshan in Taicang Prefecture.

This is the history of the Shanghai area in the later generations, but in this early Tang Dynasty, it was still a blank, and there was no administrative division, and it was directly under the jurisdiction of the Hangzhou government. Li Hao came here to set Shanghai as another economic development zone in Hangzhou, and an economic development zone in Hangzhou is not strong enough to support Li Hao's big plan, and it is necessary to develop all of this area, which is immeasurable in the entire Datang.

However, we have to ask how the shipyards on Fang Er's side are going, and several shipyards in the south of Datang are now saturated. Shipping is being developed to the northern coastline, and it is necessary for the shipyard to go north. Not only the Shanghai area will build a new shipyard and start building a new wharf.

New shipyards are being opened in places such as Dalian, Tianjinwei, Liaodong Peninsula and Vladivostok, and then new economic development zones are being built on the docks, and some areas will also be opened up for foreign merchants to rest and stay. After inspecting the environment here, Li Hao asked Fang Er about the operation of shipyards in other places, and when he got the answer he wanted, Li Hao went back and began to plan and formulate his three major plans for Hangzhou.

It took nearly a month to complete all these plans, and the sources and management of the funds were indicated, and even the management systems of those places were explained. However, when Li Hao showed these plans to Fang Er, Fang Er was shocked by the solidity and was instantly stunned.

In the past, he always felt that he had come to Hangzhou to engage in the construction of the past few years, but Li Hao had almost reached his project for several years in Hangzhou alone. The development of the West Lake, the construction of the Qiantang Seatang, and the construction of the Shanghai Economic Development Zone. These three projects all require a lot of manpower and material resources, and you let Fang Er go there to get so many resources to support these?

"It's okay, there are a lot of people, and there is no need to worry about these little things. You don't need to trouble the people here in Hangzhou, and you don't need to spend much money, I will help you bear this matter. It's easy to say that money is good, isn't there no special product in Hangzhou? Are you afraid that you won't be able to make money? ”

Lack of manpower? Is this a problem for Li Hao? Don't talk about Li Hao, it's the Tang Dynasty, now for this kind of road construction, water conservancy and general war project, will they send people?

The Goguryeo people in the north, and those foreign fans, the Fusang people in the east, the monkeys in the South Seas, and even the Kunlun slaves in Africa and the foreign Datang in Europe are not lacking. These people are cheap, and when they die, they dig a pit and bury them, with so many cheap resources, Datang is still afraid of engaging in engineering?

If it weren't for the fact that the technology was still immature, Li Hao would want to pull out all the railways and everything, and then repair them a few times around the entire Datang. You must know that the cement high-speed trunk line around Datang is not less open, if this is before, who would dare to play these projects?

As soon as you play, someone will say that it is a waste of money or other reasons. But now, the officials of the Tang Dynasty don't feel anything, the road has been repaired, and even many times the road has been repaired, and these people still don't know when it was built.

Don't worry about manpower, the rest is funding. Li Hao came here this time, and he still held several new research projects of his own students in his hands, otherwise why would he dare to come here to engage in the economic development zone?

In addition to these, Hangzhou itself also has a lot of products. The place that Li Hao thought of was a thing produced in Hangzhou Bay, that is, salt. In ancient times, salt was a strategic material second only to grain, it was a necessity for human life, so its importance can be imagined.

However, the sea salt production in Hangzhou Bay was very little mined and utilized in the Tang Dynasty, and it was not until after the Song Dynasty that a large amount of salt production began. The current price of salt in Datang is about ten yuan and one stone, although there has been a lot of impact because of the salt industry in the south, but it can't stand the large demand for this thing.

What Li Hao knows is that the Cixi Salt Farm in Hangzhou Bay is one of the most important sea salt producing areas in Zhejiang Province, with a history of salt production for more than 1,300 years. Cixi's sea salt production has long ranked first in Zhejiang, and the main production area of Andong is known as the "salt capital of Zhejiang". It is located on the south shore of Hangzhou Bay, which began in the Tang Dynasty and has a certain scale in the Song Dynasty. In the seventh year of the Song Qingli Dynasty, the coastal people of Cixi built the first dam, Dagutang, and the salt field was moved to the north of Dagutang.

According to the relevant historical records, Cixi in the Song Dynasty has built three salt farms from east to west, including Longtou, Minghe and Shiyan, among which the salt output of Shiyan and Minghe accounts for 64% of the output of the seven main salt farms on the south bank of the Qiantang River estuary, and its importance can be seen. In terms of salt quality, the salt produced in these two places is at the top of the list.

History of the Song Dynasty. In the second four of the food and goods chronicles, it is said: "The sea water east of Shiyan is salty, so although the salt color of the bamboo plate is particularly white. Later, with the movement of the Qiantang River estuary gate and the siltation of the coast of Hangzhou Bay, many salt farms were abolished. After the 13th century, the speed of northern silting on the Sanbei Peninsula accelerated, and the actual operation areas of the two salt fields of Shiyan and Minghe also continued to move northward, and finally formed the Andong salt field.

The salt production methods of each salt field in Cixi have gone through three stages: torment, plate drying, and beach drying. From the Song Dynasty to the Qing Dynasty, all the salt was fried by scraping soil, pouring brine, and frying salt. In the second year of Xianfeng, the salt production method of plate drying rose, and the decoction of salt gradually decreased.

The salt board is the main appliance for drying salt, made of cedar wood, surrounded by a wooden frame to store brine, the board surface is smooth, and the joints are embedded with putty to prevent leakage. In 1938, the number of salt plates in Andong Salt Works was as high as 670,000, and the annual output of raw salt was more than 100,000 tons, accounting for 40% of the total raw salt output in Zhejiang Province, establishing its position as the largest salt field in Zhejiang.

Li Hao's plan is to contribute the salt production area of this place and the salt drying method in later generations and sell it as a price bid, so that he can raise the start-up capital for his development plan. Then he will raise some financial resources through his own influence and slowly implement his plan in stages, so that the plan can be mostly implemented and see results within a few years.