The above mentioned are all troubles in the internal and external aspects during the Kangxi period, but internally since the birth of the Chinese nation, there has been a headache - the Yellow River flood. The story of the river disaster managed by Pan Jitao in the Ming Dynasty is still vivid, and the Pan Gong Temple in the river control area is also like the Wuhou Temple, which has some weight in people's hearts.

In fact, the Yellow River is not a sensual thinking entity, nor is it intended to make difficulties with the Chinese. On the one hand, it has problems because it has passed through the deserts of Ningxia and Inner Mongolia, and it has brought a lot of sediment and loess through the high slopes of loess. On the other hand, after arriving at Mengjin, the terrain is relatively flat, the water flow is not fast, the sediment is deposited, it is getting thicker and thicker, and the riverbed is getting higher and higher, so it can only be "diverted".

Since the Eastern Han Dynasty, more and more river bureaucrats have been fooled in the river troubles, and they have abandoned the four-character policy of "dredging, dredging, guiding, and leading" of Dayu's water control, but they have repeatedly tried to use the method of water control that has no results, and they have to build embankments to block. And the "diversion" has become a small-scale, symbolic change.

The embankments are being built higher and higher, so that several "rivers" of the Yellow River are all isolated, and the most terrible thing is that some of the downstream water outlets are also blocked, so where does the water of the Yellow River go? How can you not "get angry"?

When Kangxi succeeded to the throne, the path taken by the Yellow River at that time was different from that of the Yellow River on today's map. From the Shunzhi Dynasty to the early years of Kangxi, the Yellow River broke the matter has been constantly isolated in the passage of the river, which was in April of the ninth year of Kangxi, especially powerful, Huai'an, Yangzhou counties (you must know that the Yellow River is not going this way) The land was flooded with little left, you must know that ancient China was a big agricultural country, agricultural civilization was developed, farmers took land as the main income or even the only income, when there was no income, tenant farmers also needed to pay taxes to the landlords, and finally could only become refugees fleeing, When there is no food, it can only be "the people are hungry and cannibalistic".

Since there is a flood, we will treat it. At that time, the governor of the river was called Wang Guangyu, and the method used was to treat the head with a headache and a pain in the foot, and it was done for seven or eight years, but it had no effect, and I believe that in these seven or eight years, the people were eager to eat his flesh and sleep on his skin.

In February of the sixteenth year of Kangxi, Wang Guangyu was dismissed, and it was Jin Fu who became the governor of the river. He was a person with the yellow flag of the Han army, and once served as the governor of Anhui, originally he had no research on the governance of the river, but he was steady and steady, and wanted to manage the Yellow River well, and found a Chen Huang, a native of Qiantang, Zhejiang.

Jin Fu ruled the river from the sixteenth year of Kangxi to the twenty-seventh year of Kangxi, and in eleven years, he still completed a lot of projects.

First, he built embankments on both sides of the Yellow River east of Huaiyin, until they were only twenty miles from the coast.

Secondly, he strengthened the embankment west of Huaiyin, so that the water could be more concentrated and more powerful to wash away the sediment on the riverbed, so that after the Yellow River received the help of the Huai River, it was able to wash away its own accumulated sediment and flow to the sea without returning.

Then, knowing that the canal was related to the country's transportation and should not be interrupted for a long time because of the problems of the Yellow River, he spent a lot of silver to open a new section of the river, called the "Middle River", in addition to building the lock gates of the canal. After the completion of this project, the transportation began to flow smoothly.

Finally, in order to protect the farmland in the counties around the Yellow River and prevent the flood from overflowing the Yellow River again, a number of "water reduction dams" were built, and a number of small openings were opened under the embankment, which could release water at a convenient time, so that not only could the farmland be protected, but even the farmland could be irrigated when there was a shortage of water.

The above four are indeed great achievements, but at this time, Yu Chengchan, the governor of the Central People's Republic of China, opposed him, saying that he used too much money, that the "middle river" could not pass through boats, and that the "dam" would cause a future breach (which is really a presumption of guilt), in short, that is, his governance method was unreasonable and incorrect.

In desperation, Kangxi recalled Jin Fu to Beijing, and in March of the 27th year of Kangxi, he asked him and Yu Chenglong to debate in front of the Qianqing Gate in the palace, and Kangxi personally presided over their debate.

Although Jin Fu's method was very correct, the debate failed, not because he couldn't speak, but because Yu Chengchan was more agreeable than him in Beijing.

Jin Fu was innocently dismissed, and his think tank, Chen Huang, died on the way to Beijing. Kangxi appointed a man named Wang Xinming as the governor of the river, but to no avail, he was dismissed from his post three years later. Kangxi thought of Jin Fu again at this time, and Jin Fu had no choice but to come to control the river again, and died of hard work after a few months.

Kangxi asked Yu Jackie Chan to try, but also to see if he could only talk about it, Yu Jackie Chan was very smart, he said a bunch of wonderful methods during the debate, but when he really went into battle, he used all Jin Fu's ideas, and he did things properly, Kangxi didn't say anything about him, in the thirty-ninth year of Kangxi, Yu Jackie Chan died in office.

The follow-up water control project was completed in the 47th year of Kangxi. The Yellow River is also very sensible, no longer harms the people, until the sixth year of Xianfeng, it bypassed the Huai River and the canal, diverted its course, and went to Shandong to enter the sea, until the appearance of the Yellow River today.