The two returned to Liu'er Lane, the long-term workers at home were still busy, and the yard was brightly lit, but because of the oil lamp, the "spring" grass deliberately had a "handover" generation, and everyone was very careful.

The 'spring' grass was also tired for a day, and he thought about going over to continue to help, but was stopped by Lu Ziqi, "Rest first, and come back tomorrow morning." ”

It's really late, and the 'spring' grass also understands that people are not machines, and they still have to raise their 'spirits', and there are still many things to deal with later, so they said to the people in the yard, "Everyone clean up, rest early, and continue tomorrow." ”

Everyone listened to the instructions of the 'spring' grass, and they were indeed very tired, and they all stopped what they were doing, cleaned up the workbench, and prepared to rest.

The two returned to the room that Qiu Ju Dongmei had cleaned up earlier, washed up and went to the 'bed', but the 'spring' grass couldn't fall asleep over and over, and moved around in Lu Ziqi's arms.

Lu Ziqi had to speak, "Rest early, and I'll get up tomorrow morning to be busy." ”

'Spring' Cao couldn't help but speak, "Nerd, do you say Qingyang City can hold it?" ”

Lu Ziqi sighed in his heart, can he hold on? He also didn't know that the Rong people dispatched at least 500,000 troops this time, and the border defense also stationed 300,000 troops, ready to support at any time, the Qingyang garrison was less than 50,000, plus more than 50,000 border garrisons Even if they all evacuated back to Qingyang City, at most it would only be 100,000, 100,000 against 800,000 troops.

The mouth was comforting, "As long as Qingyang City works together, it will definitely be able to hold it, and after half a month, reinforcements will be able to arrive." ”

Yes, it will take half a month for the reinforcements to be fast, if there is a slight delay, I am afraid that it will take more than half a month and almost a month, and Qingyang City will have to hold on for at least half a month.

"My brother doesn't know what's going on. I'm always a little worried about my brother. ”

Lu Ziqi patted the back of the 'spring' grass and comforted him softly, "Brother, you don't have to worry, Wan Lei will definitely not let my brother take risks, as long as Wan Lei withdraws, my brother will definitely come back." Go to bed early. ”

The 'spring' grass tried to close her eyes and 'forced' herself to sleep.

Early the next morning, the sky was 'Meng' and 'Meng' bright, the 'spring' grass was up, the long-term workers in the yard had already been busy, Lu Yong had already made breakfast, and watched the two of them go out of the 'door', so he said, "Young master, madam, breakfast has been prepared." ”

After everyone had breakfast, 'Chun' Cao instructed Changgong to continue to make mines, and he planned to go to the 'gate' of the city with Lu Ziqi to see if there was any new news.

Yu Haoran came over at this time and asked if there was any need for 'Chun' Cao, and 'Chun' Cao directly told him the address of Boss Wu's furniture store, and asked him to be in charge of the dropping machine over there, and he also asked him to continue to collect the materials for making mines here.

Lord Yu didn't go back to home, and he kept staying at the office next to the city gate, so he probably only took a nap, looking tired. Seeing the two of them coming over so early, he said, "Why did you come here so early?" ”

Lu Ziqi handed the reins to the guards on the side, pulled the 'spring' grass into the house and sat down, and said, "Let's see if there is any new news here, is there any news from General Wan's side?" ”

Lord Yu shook his head, "The person who sent the letter to deliver the letter last night hasn't come back yet, and I haven't heard any movement from the north." ”

'Chun' Cao nodded, "It is estimated that the Rong clan didn't dare to act rashly last night, but I'm afraid that there will be some action today." ”

Yu Dadao, "If there is any action today, if General Wan retreats to Qingyang City, I am afraid that he will come over tonight." ”

Chun Cao lowered her head and thought for a while, "We can't sit still. ”

Lu Ziqi thought of it with 'Chun' Cao, and said to Yu Daren, "Is there a detailed map of Qingyang City?" ”

Lord Yu nodded, "Yes." As he spoke, he took out a drawing from the side and laid it out on the table.

The map is indeed 'quite 'certain', even where there is a mountain and where there is a valley, it is very detailed.

'Chun' Cao looked at the map and said to Lu Ziqi, "Which way do you think the Rong clan will come from?" ”

Lu Ziqi pointed to one of the valleys, "This is the nearest road, it should come from here." ”

The shape of the valley, the 'spring' grass is bright, "Let's set up an ambush here first." ”

Lord Yu didn't agree very much, "We are such a small number of people, even if we 'draw' people to set up an ambush, how can we resist the hundreds of thousands of troops of the Rong clan?" ”

'Chun' grass pursed her lips and smiled, "Then we won't have a hard fight with him, let's come to 'Yin'." ”

Lord Yu wanted to hear it, so he stopped 'interjecting' and waited for the 'spring' grass to continue.

'Spring' grass looked at the map, "We set up an ambush in this valley, the Rong tribe is ambushed, and it is bound to change the route." ”

Lu Ziqi's eyes narrowed slightly, "If the Rong clan changes their route from the beginning, they will definitely choose a route that is flat and not suitable for ambush, let's set up an ambush here and wait for them to come." ”

Lord Yu said, "If our ambush doesn't cause them much damage, they will definitely still travel directly from the valley, which is much closer. "That's a real problem.

"Then we 'forced' them to change their route and blew up the cliffs, so they had to change their route." ”

"Blown up?"

'Chun' Cao nodded, "It's blown up, I'll go back to make explosives' this time, and ask Lord Yu to send a letter to General Wan again, and ask General Wan to delay it until the evening as much as possible, so as to buy us a day to prepare." By the way, tell them about the retreat route, right from this valley. ”

Master Yu thought about the method of making Wan Lei's weapon in his hand, and said without doubt, "I'll send someone." "After saying that, he took up the pen and quickly wrote a letter, and 'handed it over' to a reliable messenger to send it.

'Spring' Cao looked at Lu Ziqi on the side again, "Set up an ambush on the flat ground and dig a trap?" ”

Lu Ziqi nodded, "The barbs under the trap you said are very good, suitable for dealing with cavalry, we can also set up a horse rope, a large number of cavalry pass by, it must be a person on his back." ”

"Then if they are ambushed on the flat ground, will they change course again?"

Lu Ziqi shook his head, "No, if they change the route again, from other paths, it will be too detouring, I think they should be careful, send people to reconnoiter first, clear the obstacles, and then continue to move forward." ”

'Spring' grass thinks about it, too, these trap obstacles can give the enemy a surprise blow, if the enemy finds out, act carefully, there is no threat.

Sighing lightly, 'Spring' grass said, "It can be delayed for a while, and it can only be like this first, Lord Yu, let's go back to make explosives first, and if we are ready, we still need the adults to provide manpower to go to the ambush site to make traps." ”

Lord Yu didn't have a better way now, but he felt that this ambush could be resisted for a while, so he pointed to the road on the flat terrain on the map, and said, "The trap on this road, I'll send someone to do it now, but over there in the valley, I have to trouble you." ”

The two said goodbye to Lord Yu and went back to Liu'er Lane directly, Lu Ziqi sat on the back of the horse behind the 'spring' grass, and said, "The explosive 'medicine' you said was not studied in the Elder Pavilion last time, right?" Is it too late to do it now? ”

'Chun' Cao didn't know if it was too late to come, so he just said, "Since the recipe for the mine has come out, then we can make a detonator according to the recipe of the mine, and then make it into an explosive 'charge' bag, which should work." ”

Lu Ziqi nodded, "I can only try it first, if it doesn't work, use fire to attack." ”

'Spring' grass knew that it was actually possible to attack with fire in the valley, but she wanted to use explosives to directly blow up the cliffs on both sides, and the stones on the cliffs fell, which was not only a powerful weapon to attack the enemy, but also cut off the enemy's path.

Back in the yard, 'Chun' Cao instructed Lu Yong to find a bamboo tube, and then found a bamboo in the yard, and asked Lu Ziqi to help cut it into a bamboo tube, according to the recipe of the mine, began to load the gunpowder 'medicine', and then installed the lead, loaded the three bamboo tubes, tied them together, and then connected a longer lead.

'Chun' Cao took a small explosive 'medicine' and said to Lu Ziqi, "Let's go outside the city first and see if it works." ”

Lu Ziqi took the 'spring' grass on the horse, took the freshly baked explosives, and went to the city 'gate'.

Lord Yu looked at the several bamboo tubes tied together in the hands of the 'spring' grass, this is a weapon? I couldn't believe it, and then I personally took the two out of the city and went to a more remote place to the north to test whether the bomb was successful.

The 'spring' herb wanted to be thrown out by directly igniting the fuse, which was also safe, but Lu Ziqi reminded that when it was made, it was already tight and very rough, and this thing was thrown out, I am afraid that it has not been blown up yet, and all the fire 'medicine' stuffed in it has been poured out. In the end, I had to put a few bamboo tubes in place and lay a long lead on the ground.

The 'Spring' Grass, Master Yu and the two guards behind him all stood far away first, and Lu Ziqi was responsible for lighting the fuse, and then quickly ran to the 'Spring' Grass.

Standing here, there was no response for a long time, and Lord Yu couldn't help but be a little anxious, "Why don't you go over and have a look?" ”

'Spring' Grass shook his head, "Maybe the fuse didn't burn or blew up, at least it had to smoke a little." ”

As soon as he finished speaking, there was a "bang" over there, and where the explosives were located, dirt splashed and smoke filled the air.

The "spring" grass "excitedly" hugged Lu Ziqi's neck on the side, "Exploded, exploded, succeeded, succeeded." ”

Lu Ziqi hugged the 'spring' grass to prevent her from falling, looked at the direction of the explosives, and the corners of his mouth also 'revealed' a smile.

Lord Yu and the two guards were shocked and didn't come back to their senses, staring blankly at the direction of the smoke.

Lu Ziqi looked at his daughter-in-law who was happy and forgetful, and Lord Yu, who was shocked and opened his mouth wide, and had to remind, "Since we have succeeded, let's go back and do more, and we must hurry up to prepare for the ambush." ”

'Spring' grass nodded again and again, "Yes, let's hurry up and do more." ”

Lord Yu finally recovered from the shock, no wonder General Wan was able to deter the hundreds of thousands of troops of the Rong clan, this power is so terrifying.

A few people returned to the city, and the 'spring' grass and Lu Ziqi were busy making explosives, the production of explosives', the 'spring' grass was useless for the long workers, so they let the long workers continue to make mines, and only called the people of the Shadow Villa to help, Lu Ziqi and Lu Yong, Qiu Ju Dongmei, and the guards brought by the Shadow Villa, this thing is too dangerous, and the 'Spring' grass doesn't want too many people to know that the guards of the Shadow Villa have undergone special training, at least they should rest assured.

The explosives made this time, the 'spring' grass directly tied ten into a bundle, and then wrapped it in cloth, leaving a long fuse that ignited outside.

In the afternoon, when Lord Yu looked at the explosives of the half-carriage pulled by the 'spring' grass, he had some palpitations, if he accidentally ignited, he was afraid that he would have to go half the street.