Taking advantage of the fact that it was still some time before dark, Jin Feng led Wei Datong and others up Yulei Mountain and looked towards the Jinma River to the west.
At this time, there was a long and narrow island in the middle of the Jinma River. This island was the water-dividing fish mouth.
The water-dividing fish mouth divides the Jinma River into two parts. The east side is called the Neijiang River and the west side is called the Outer River.
When the water level is low, the river water will flow into the Neijiang River first, pass through the Yulei Mountain from the mouth of the treasure bottle that is about to explode, and be diverted through canals to irrigate the Chengdu Plain.
When there is a lot of precipitation in summer, the water level rises and the river water will overflow the west dike, thus achieving a diversion effect.
This is the principle of the water-dividing fish mouth automatically adjusting the water flow.
At the end of the water-dividing fish mouth is the Feisha Weir.
The function of Feisha Weir is to further regulate the water flow. When the water level in the inner river is too high, the river water will overflow into the outer river through Feisha Weir.
In addition to flood discharge, Feishayan can also use the vortex formed by the water flow to throw the sediment carried by the bottom of the river into the outer river, thus ensuring the smooth flow of the inner river.
"Master Wei, thank you for your hard work!"
Jin Feng patted Wei Datong on the shoulder, feeling deeply moved in his heart.
Dakang did not have large-scale construction machinery. In order to build the water-dividing fish mouth, Wei Datong mobilized countless fishing boats from all over the country and asked the people to weave bamboo strips into bamboo cages, and then filled the bamboo cages with stones and sunk them to the bottom of the river.
It can be said that Wei Datong led the people and built a small island in the middle of the river by relying on the spirit of Foolish Old Man to move mountains.
"It's all as it should be. If it weren't for the support of Sir, His Highness and Lord Qing, I wouldn't be able to do this at all."
Wei Datong quickly waved his hand.
This is not because he is modest, but because he is honest.
The main project of Dujiangyan was designed by Jin Feng, and the people responsible for the construction were mobilized by Ninth Princess and Qing Xinyao. Without Jin Feng and the others, Wei Datong would not have been able to accomplish this.
In particular, Jin Feng's role is the most important.
Without the ideas provided by Jin Feng, no matter how many people Ninth Princess and Qing Xinyao mobilized for him, he would only be able to clean up the river sand and widen the river channel, and there would be no way he could even think of digging up Yulei Mountain.
"No matter what the reason is, Mr. Wei's hard work has paid off!"
Jin Feng promised: "When the mouth of the treasure bottle is built, I will definitely ask Lord Qing and His Highness to jointly submit a letter to Your Majesty to report Lord Wei's contribution!"
"Thank you, Master Imperial Master!"
Wei Datong was no longer modest this time and quickly bowed to salute.
Jin Feng helped Wei Datong up and looked down the mountain again.
The Dujiangyan Irrigation Project is mainly divided into three parts: Yuzui, Feishayan and Baopingkou. Now Feishayan and Yuzui, the waterdividing project, have been completed, leaving only Baopingkou.
The biggest test that Li Bing and his son encountered back then, and the part that took the longest time, was Baopingkou.
After all, they didn't have explosives back then, so they relied on the people to burn the stones with fire, then pour cold water on them to form cracks in the stones, and then cut through Yulei Mountain bit by bit.
This kind of work efficiency can be imagined.
As for the water diversion fish mouth and Feisha Weir, it is much simpler. Just let the people put the stones on the boats and throw them into the center of the river.
In the next two days, Jin Feng stayed on Yulei Mountain, calculating the location suitable for blasting.
The escort team escorting the explosives also rushed to the foot of Yulei Mountain and began to make simple explosive bags according to the method taught by Jin Feng.
Mancang also came with a manual drilling machine designed by Jin Feng.
When the Ninth Princess arrived a few days later, Jin Feng happened to be coming down from the mountain.
Also arriving with the Ninth Princess were the brothers Qing Xinyao and Qing Mulan.
Even Concubine Qing came to join in the fun.
"Isn't the empress going to Xichuan? Why are you here?" Jin Feng asked in surprise.
According to the Ninth Princess's plan, she would first send Concubine Qing to Xichuan to pay homage to her deceased brother, and then come to Dujiangyan.
"We walked to Qingjian Town and met brother Xinyao and sister Mu Lan. They wanted to see you start a mountain."
The Ninth Princess said helplessly: "How deserted is it for my mother and concubine to go to Xichuan City alone? So I came with my mother and concubine."
"Why, don't the Imperial Master welcome me?" Concubine Qing asked pretending to be dissatisfied.
Although the recent period has been tiring and tiring, it has been the happiest period of her life.
She finally understood why the Ninth Princess liked Xihewan.
She no longer has to worry about scheming with others and can just eat, drink and have fun. If it were her, she would choose to marry Jin Feng instead of marrying a powerful son in the capital and being locked in a purdah compound for the rest of her life.
In a cheerful mood, Concubine Qing gradually stopped acting like a concubine, and recently learned to make jokes.
"If I don't welcome the empress, Wuyang won't let Qin'er hammer me to death?"
Jin Feng said with a smile: "I'm just worried that my wife will be too tired from traveling and traveling!"
"How can I be as domineering as you say?"
The Ninth Princess pouted her lips pretending to be angry, but she felt sweet in her heart.
Concubine Qing's eyes narrowed with laughter.
Dakang favors boys over girls, and no one wants to admit that he is afraid of his wife.
Jin Feng openly teased him about being afraid of the Ninth Princess. In Concubine Qing's view, this was the best expression of their love.
Qing Mulan was caught off guard and stuffed a mouthful of rations. She choked and rolled her eyes wildly. She said angrily: "Sir, when are you going to start the mountain?"
When it came to business, the faces of Ninth Princess and Concubine Qing also returned to seriousness, and they turned to look at Jin Feng.
"Drilling has just been completed in the morning. Now Hammer is leading people to arrange explosives. If everything goes well, blasting can be carried out this afternoon." Jin Feng explained.
"We came at the right time!" Qing Mulan clapped her hands and suddenly asked: "Then if we didn't come, would you have exploded yourself?"
Although Jin Feng had such a plan, he definitely couldn't say that.
He shook his head and said: "How can it be possible? If something like blasting a mountain opens up, I must ask you to witness it together!"
"You have a conscience!"
Only then did Qing Mulan let Jin Feng go, and skillfully took out the telescope from Jin Feng's sleeve to see Iron Hammer and others who were placing explosives on the mountain.
"Sir, shouldn't the bombing of mountains start from the bottom? Why are they always on the mountainside?" Qing Mulan asked.
"Such a big mountain cannot be exploded at once. It must be exploded multiple times." Jin Feng explained.
"That's it!" Qing Mulan nodded.
"There's nothing interesting about setting up explosives. Wuyang, you take my wife to rest first. When you're ready, I'll send someone to call you!"
Jin Feng looked at the belly of the ninth princess and winked at Qin'er.
This time Qin'er did not contradict him and stepped forward to hold Ninth Princess's arm.
It was almost as predicted by Jin Feng. After lunch, Iron Hammer came over to report that the installation of the explosive pack was completed.
"Have the people around Yulei Mountain evacuated?" Jin Feng asked.
"The evacuation has been over a long time ago. Now everything is ready. We are just waiting for you, sir!"
Iron Hammer rubbed his hands and said.
He has used grenades and is very aware of their power.
The explosive packs were many times larger than grenades, and more than one was installed.
This makes Hammer look forward to what will happen after the explosion!