Siheyuan, integrating everything, cultivating the city

"What's going on?" he muttered to himself.

Suddenly, a tiny pest emerged from under a leaf and quickly crawled toward another leaf. Li Xiangqian was shocked. He had never seen such a bug before. He quickly pinched the pest and found that its body was dark purple with some fine hairs on the surface. Although it looked insignificant, Li Xiangqian felt an indescribable threat in his heart.

"This bug is definitely not an ordinary pest." He said softly.

Li Xiangqian put the pest in a small bottle and prepared to go to the old herbal farmer in the village for help. The herbal farmer, Lao Liu, was an old man who was proficient in various herbs and pesticides and had rich experience in dealing with problems in the fields. On the way to Lao Liu's house, Li Xiangqian felt a little uneasy.

Old Liu's home is at the other end of the village. It is an ancient courtyard with various medicinal herbs planted in the yard, exuding a strong herbal aroma. Li Xiangqian walked to the door of Old Liu's home and knocked gently.

"Old Liu, are you home?" Li Xiangqian shouted.

The door slowly opened, and Old Liu appeared at the door. He had a kind smile on his face and looked amiable. When he saw Li Xiangqian, a hint of surprise flashed in Old Liu's eyes.

"Li Xiangqian, how come you have time to come to my place? What's the matter?"

"Old Liu, take a look at this." Li Xiangqian handed him the small bottle containing pests.

Old Liu took the bottle, examined it carefully, and frowned. He was silent for a moment, then looked up at Li Xiangqian.

"This insect is really unusual. I have never seen it before." Old Liu's voice was filled with worry. "This insect doesn't seem to be local. It is likely to have come from other places."

"What should I do? Will it cause great harm to my fields?" Li Xiangqian asked anxiously.

Old Liu nodded. "Indeed. Let me go find some herbs to see if they can deal with this pest. At the same time, you should also pay attention to other plants in the field to see if there are similar insects."

"Thank you, Old Liu. I'll go back and check it out right away." After saying this, Li Xiangqian hurriedly left Old Liu's house.

Back at the courtyard, Li Xiangqian's mood became even more heavy. He walked into the field and carefully examined each plant, and found that similar damage had occurred on the leaves in some places. Obviously, these pests had begun to spread in the field.

"This is a really big problem." Li Xiangqian muttered to himself, "I have to find a way to solve it."

He decided to redouble his efforts, not only to remove the pests, but also to find the root cause and ensure that the pests would not continue to spread. Li Xiangqian worked in the fields every day, constantly cleaning up the damaged plants and looking for useful herbs. He also contacted several neighbors, hoping to use everyone's strength to deal with this sudden disaster.

Neighbors expressed concern about Li Xiangqian's plight and offered their help. Especially Li Xiangqian's good friend, Uncle Zhao, an elderly farmer with rich experience in the growth of various plants and the prevention and control of pests. After Uncle Zhao learned about Li Xiangqian's plight, he immediately came to the courtyard and brought some traditional insect repellents and pest control techniques.

"Xiang Qian, don't worry. I brought some anti-parasitic herbs and recipes. I have used these myself and they are very effective." Uncle Zhao said as he placed the herbs on Li Xiangqian's desk.

Li Xiangqian looked at Uncle Zhao gratefully, "Thank you very much, Uncle Zhao. Without your help, I really don't know what I would do."

Uncle Zhao smiled and said, "It's nothing. We are all neighbors and we should help each other. Remember to follow this recipe. It's best to clean up all the damaged plants and then spray them on the fields."

Following Uncle Zhao's advice, Li Xiangqian began to prepare insect repellent and sprayed it carefully in the fields. He also increased the frequency of inspections to ensure that every plant was taken care of in a timely manner.

A few days later, although the number of pests in the fields has decreased, the situation is still not entirely optimistic. Li Xiangqian found that these pests seemed to have a self-repair ability and would always reappear quickly after being removed. He began to worry whether these pests would become more and more difficult to deal with and might even threaten the ecological balance of the entire courtyard.

One night, Li Xiangqian was walking in the courtyard and saw that some flowers and plants in a corner of the courtyard seemed to be abnormal. There were some strange marks on the petals of those flowers, as if they were corroded by some liquid. Li Xiangqian was moved. Could it be that these pests were not only harmful to vegetables, but also to flowers and plants?

He decided to go to Old Liu the next morning and ask him to help check again. As night fell, Li Xiangqian wandered in the courtyard, feeling very heavy. Although the environment of the courtyard was still beautiful, he felt that the tranquility was broken by the threat of pests. The night around him became darker and darker, and the stars twinkled in the sky, as if reflecting Li Xiangqian's inner worries.

In this quiet night, Li Xiangqian sat on a small stool in the yard, thinking about future countermeasures. He realized that this was not just a matter of dealing with pests, but also about the future of the entire courtyard. Every leaf and every flower was the result of his hard work, and he could not tolerate these beautiful plants being destroyed.

"I must find a way to protect these plants." Li Xiangqian secretly made up his mind, "No matter how difficult it is, I will do my best to solve this problem."

The next morning, Li Xiangqian brought the damaged plant samples to see Old Liu again. After seeing the samples, Old Liu's expression became more serious. After carefully examining them, he said in a deep voice: "This situation is more complicated than I thought. These pests not only destroy the plants, but they also seem to spread a special kind of bacteria."

"Bacteria?" Li Xiangqian asked in surprise, "What effect will this have on plants?"

"This pathogen weakens the plant's immune system and makes it vulnerable to various external factors. The worst thing is that if it is not dealt with in time, it may cause the plant to wither completely." Old Liu said with a hint of worry, "We must find the root cause as soon as possible and take more effective measures."

After hearing this, Li Xiangqian felt an unprecedented sense of urgency. He decided not to rely solely on traditional methods, but to seek more help. He contacted several famous plant experts, told them about his problem, and asked for their advice.

A few days later, a botanical expert named Professor Zhang came to the courtyard. Professor Zhang brought professional equipment and carefully examined the situation in the field. He conducted a number of tests on the spot.