Wang Junkuo escaped by killing people, and the entire Chang'an City was martial law. However, as Lao Qiu said, people may have escaped from Chang'an City, so no matter how much they investigate, it was useless, but they had to be investigated. As a result, it caused great trouble to the people in the city, and it was very inconvenient to enter and exit the city gate. Fortunately, Li Xiu is now the son-in-law of the Tang Dynasty, so he finally got out of the city gate smoothly.

However, when he was on the road, Li Xiu was thinking about Wang Junkuo. This person's fate was also affected by him. If he remembered well, Wang Junkuo seemed to have escaped guiltily when he was recalled to Chang'an, but he was killed by a savage in the countryside. But now he was escorted back to Chang'an, but he escaped. I just don't know if he can change his destiny in history?

I don’t know how long it took, but when Li Xiu woke up from his thoughts, he opened the car window and looked at it, but found that he was about to get home. A little further forward was the Ministry of Agriculture’s Office. This made me suddenly think of something, so I ordered the coachman to stop the carriage, jump off the carriage and let them go back first, and then walked towards the Ministry of Agriculture’s Office.

The market in front of the government office became more and more formal. Not only were there more shacks, but the style was also cleaner. Various small vendors were shouting at their own business to attract customers. Li Xiu walked through the crowd to the familiar Hu cake stall. When the uncle who sold Hu cakes saw him, he immediately picked up a golden Hu cake and cut it open, and stuffed two taels of cut mutton. Li Xiu paid with a smile and took it over and ate it while walking. Although he had just had a banquet in Wufu, in that kind of occasion, he mainly chatted rather than eating and drinking. In fact, he was already hungry on the road just now.

Li Xiu took Hu cakes while eating them. When the officials inside nodded and greeted him when they saw him. Although the yamen did not allow food to be eaten casually after Yingmao, everyone was selectively blind to the Hu cakes in Li Xiu's hands. After all, Li Xiu was originally a special existence in the Ministry of Agriculture, and it was normal for him not to see anyone for several days.

After entering the yamen, Li Xiu wanted to go to the backyard to find Yang Dui, but he didn't expect to meet Yang Nong. When the other party saw him, he stopped him happily and said, "Li Jijiu, you are here just right. I happened to have something to look for you!"

"Oh? What made you so happy for Shangshu Yang?" Li Xiu couldn't help but ask in surprise when he heard this.

"Haha, don't call me Shangshu anymore. I took the initiative to give up the position of Shangshu of the Ministry of Revenue two days ago, so now I am just a doctor in the Ministry of Agriculture. You should call me Yang." Yang Nong smiled and corrected that he had no choice but to ignore the affairs of the Ministry of Revenue. As soon as Li Shimin also wanted to install people in the Ministry of Revenue, so he simply took the initiative to retreat, which could be considered as selling Li Shimin's favor.

"It's better to hand over the position of Shangshu, so as not to be implicated in court battles anymore. For example, Pei Xiang and Shangshu Wu from the Ministry of Works, life is not easy now. Since Shangshu Yang, you have retired, you can manage the affairs of the Ministry of Agriculture with peace of mind. It's really inappropriate to call Shangshu. I'll call you Gong Yang in the future!" Li Xiu was stunned when he heard this, and then smiled again and said.

"Haha~, let it be, it doesn't matter what you call it!" Yang Nong laughed when he heard Li Xiu's honorific title, then paused and said, "But I'm not calling you to tell you about this. The person you asked me to look for last time has been found, but I just don't know when you have time to visit me?"

"Uh? Have you found it?" Li Xiu couldn't help but be surprised when he heard Yang Nong's words. He had just gone to find the warrior today, hoping that he would help him find a craftsman who knows how to build ships, but he didn't expect that Yang Nong had found it so by chance. If he had known this, he might as well not go today.

"Yes, I sent someone to inquire about it a few days ago, and finally got to someone's residence. However, this person's identity is a bit special and his arrogance is a bit big, so we'd better visit it in person. I wonder what you think?" At the end of the day, Yang Nong asked again.

"No problem, I'm free at any time, but I don't know when, Mr. Yang?" Li Xiu said excitedly when he heard this. Although he had already asked the warrior to come, it's nothing to meet the person recommended by Yang Nong first. At worst, it's nothing to invite Qi Niang to join him.

"That person lives in Chang'an City. I happened to be going home tomorrow. You come to find me and let's go to Chang'an together!" Yang Nong said immediately.

"Okay, that's it!" Li Xiu agreed immediately, and then talked to Yang Nong about the affairs in the yamen before saying goodbye and leaving. As long as someone is invited tomorrow, there is no need to worry about Qi Niang's daily chanting.

Now Li Xiu stepped into the backyard of the yamen. This place is actually the experimental field of the Ministry of Agriculture. There are greenhouses and ponds. Various crops grow on the fields opened. Yang Dui has become the third person in the Ministry of Agriculture, but he is still very hardworking. He will soak here whenever he has time and is familiar with the habits of various crops.

Li Xiu saw Yang Dui standing next to a field of sweet potatoes at a glance. He walked over. As a result, Yang Du also saw him at this time, and immediately came forward with a smile and said, "Li Jijiu, why are you here?"

"I just came back from Chang'an City. I came here to take a look. By the way, how did you do the last time?" Li Xiu asked with a smile.

"You're such a coincidence. I'm about to talk about this matter to you!" Yang Dui said excitedly at this time, "Last time you said there were good rice seeds in Cham City, so I sent official documents to several prefectures in the south in the name of our Ministry of Agriculture, hoping that they could go to Cham City to get some rice seeds. Now the south has replied, saying that people have been sent, and it's probably not long before there will be news!"

"That's good. Please keep an eye on this matter. Although the yield of Chameng rice is not as good as corn and sweet potatoes, it is very suitable for planting in the south. It is said that it can be cooked three times a year. If you find it, you can promote it in the south!" Li Xiu nodded when he heard this and said, corn is not suitable for planting in the south. Although sweet potatoes are good, they have a single nutritional structure and still need to be eaten, so he thought of Chameng rice. This thing seems to be introduced in the Song Dynasty, but now it can be several hundred years in advance.

"Don't worry, Li Jijiu, the matter of Chameng Dao is to his subordinates!" Yang Dui immediately patted his chest and promised that unlike sweet potatoes and corn, Chameng Dao was a task assigned to him by Li Xiu in private. If done well, nearly half of the credit will be his, so he is also full of motivation.

Hearing Yang Dui's promise, Li Xiu also smiled. He was very optimistic about this very energetic subordinate, but Yang Nong said that his nephew was not from a formal way and his future career was limited, which made Li Xiu feel sorry for Yang Dui.

After talking about Chamengdao, Li Xiu had nothing else to do and was about to leave now, but at this moment, Yang Dui suddenly grabbed his arm and said excitedly: "Li Jijiu, there is one more thing I want to invite you to see!"

"Oh? What's the matter?" Li Xiu said in surprise when he heard this, mainly because Yang Dui's expression was too excited, which made people feel a little abnormal?

"Hehe, you'll know when you go and take a look!" Yang Dui deliberately kept it a secret, which made Li Xiu even more curious. He nodded and said, "Okay, where is it?"

"I'm not in the yamen, but outside the yamen. I'll take you there now!" Yang Dui said excitedly again, and after that, he turned around and took Li Xiu out of the yamen.

Li Xiu followed Yang Dui out of the yamen, walked through the market and turned south, and walked nearly a mile before he came to a fenced open space. A simple small shed was built in the middle, which surprised Li Xiu a little, because it was not very far from his home, and you could even see his house standing here, but he didn't know when a small shed with no purpose was built here. Could it be that this was a toilet?

Yang Dui pushed open the fence door and walked in, then smiled at Li Xiu and said, "Do you know what is being done here?"

"This..." Although Li Xiu wanted to say that this might be a toilet, it was too low after all, but seeing Yang Dui's serious appearance made him embarrassed to say it, so he could only shake his head in the end.

Seeing Li Xiu shaking his head, Yang Dui seemed even more excited. He pulled Li Xiu to the small shed, but the shed was a little strange, with nothing inside, but a thin bamboo tube sticking out on the ground, with a circle of iron wrapped around the mouth of the tube, and a ball of rag was stuffed on it. I don’t know what to do?

"Li Jijiu, do you still remember what you taught me?" Yang Dui asked with even more excitement at this time.

"What did you teach you?" Li Xiu couldn't help but smile bitterly when he heard this. Because when he was with Yang Dui in the past, he sometimes deliberately told Yang Dui some knowledge of later generations, and sometimes he was talking nonsense all over the sky, so he didn't know what Yang Dui was talking about for a while?

"That's it!" Yang Dui said as he suddenly took out a fire slap from his arms. After igniting it, he reached out and took off the rag from the bamboo tube and brought the fire slap over. As a result, a slight burst sound was heard, and a yellow and red flame appeared on the bamboo tube. This was definitely not the bamboo tube burning, but the gas coming out of the bamboo tube burning.

"This... this is natural... no, it's biogas!" Li Xiu couldn't help but say excitedly when he saw this familiar scene. He had seen too many similar scenes when cooking at home in his previous life, but there was no natural gas in this era. The only possibility was that Yang Dui made the biogas. In addition, he suddenly remembered that he seemed to have mentioned some biogas to Yang Dui before, but he didn't expect that he actually made it.

"That's right, it's biogas. After I heard about biogas from Jijiu, I was very interested in it, so I asked someone to build a biogas pool here, and the tube went straight to the ground. A lot of dirty things were thrown into the biogas pool below. I didn't expect that it could really produce biogas that could burn." Yang Dui said excitedly. This was an experiment he independently developed, and it was successful, which made him feel very accomplished, so he couldn't wait to show it to Li Xiu.

"Hahaha~, not bad, Yang Du, you are so amazing. You just heard me say a little about biogas and then made it out!" Li Xiu couldn't help but pat Yang Du on the shoulder and exclaimed. Biogas is closely related to agriculture. Many rural families in later generations used biogas as fuel, and there were also biogas pools at home, so Li Xiu told Yang Du a little, but he didn't expect that he was really concerned.

Hearing Li Xiu's praise, Yang Dui was even happier. He pulled Li Xiu and wanted to tell him about his biogas. However, Li Xiu saw that the bamboo tube was still burning, and immediately reminded him: "Don't destroy this first, so as not to cause fire..."

Before Li Xiu finished speaking, Yang Dui directly stuffed the rag in his hand back onto the bamboo tube, which scared Li Xiu so much that he was sweating because this method was too dangerous. You should know that there was a biogas pool below. If the flames detonate the biogas pool below, they would probably both die without a complete body.

Fortunately, after Yang Dui blocked the bamboo tube, the flames immediately went out, and there was no abnormal movement in the underground biogas pool. This made Li Xiu wipe the cold sweat from his forehead. He thought to himself that Yang Dui was really stupid and bold, and he blamed him for not telling the biogas how dangerous it was.

Yang Dui was anxious to show off his achievements to Li Xiu, but he didn't pay attention to Li Xiu's abnormality at all. He immediately ran outside and introduced the biogas pool to Li Xiu. Seeing his happy appearance, Li Xiu was embarrassed to interrupt. He thought that it would be too late to wait for a while to leave the place before telling Yang Dui the safety measures he needed to pay attention to.

"Look, look at Li Jijiu. This is the feeding port of the biogas pool!" Yang Dui ran to a corner of the open space outside the small shed, reached out to lift a stone lid, revealing a black hole.

Li Xiu also walked over and took a look. He found that the hole was quite deep, and it was made of blue bricks next to it, which looked more like a deep well, but it emitted a stench from the hole, which was normal. After all, all the people thrown inside were covered with some people's urine feces or rotten vegetable leaves, and the taste would definitely not be good.

Li Xiu pinched his nose and looked into the hole carefully, then took a few steps immediately, then took a long sip of fresh air, and asked casually: "Yes, what is the range of this biogas tank and what is the depth?"

"The range is not very large. We are standing at the small shed, but only about seven or eight steps. As for the depth..." When talking about the depth, Yang Dui seemed to be unable to remember for a moment, so he leaned his head into the hole, but the black hole could not be seen clearly.

Originally, Li Xiu just asked casually, and it was nothing if Yang Dui couldn't answer, but he might be anxious to show that he had to figure out how deep the biogas tank was? So he made an action that scared Li Xiu to death, and took out the fire in his arms and ignited it again. It seemed that he wanted to see the depth of the hole...
Chapter completed!