The ointment was very effective. After applying it, Qingfeng's wounds healed and his skin was no longer red and swollen.

Qingfeng went to study with a refreshed look.

Out of curiosity, Meng Qingyin also followed over to check it out.

Qingfeng brought a lot of experimental equipment, some of which she couldn't even name, and they looked very expensive.

After looking at it for a while, Meng Qingyin gave up because she really couldn't understand it.

…

In the middle of the night, Meng Qingyin was woken up in a daze.

“Master, Master!”

"I've figured it out! The juice of the mutant dragon beard grass can inhibit the activity of black-winged insects!"

Qingfeng's excited voice was just outside the door.

Meng Qingyin woke up immediately, all her sleepiness gone.

She jumped out of bed, opened the carriage door, and met Qingfeng's eyes full of excitement.

"Can its juice inhibit the activities of black-winged insects?" Meng Qingyin murmured.

Qingfeng nodded heavily. "Yes! Mix the juice with water. A low concentration of the mixture can inhibit the activity of black-winged insects. A high concentration can kill them directly! Moreover, it can also reduce the reproduction ability of black-winged insects! This is a natural insecticide!"

After saying that, Qingfeng shook the spray in his hand and pretended to hit the car window, "Master, can I show you?"

Meng Qingyin nodded, "Okay."

If the juice of the mutated dragon beard grass really has such magical effects, it is indeed the best insecticide.

As Qingfeng moved, the moment the car window opened, the black-winged insect flew into the car.

Qingfeng was quick-witted and quick-handed. He closed the car window with one hand to prevent more black-winged insects from coming in, and with the other hand he sprayed the black-winged insects in the car.

The effect is immediate. Once the black-winged insects come into contact with the spray, they fall to the ground with a crackling sound, as if they have been hit by a powerful knockout drug, and die instantly.

Meng Qingyin didn't expect that the juice of the mutated dragon beard grass was so magical that it would work as soon as it was sprayed?

The effect is so good.

As for slowing down their reproductive capacity, they are destroyed as soon as they fly in, so I'm afraid they have no time to reproduce?

Qingfeng squatted down and motioned Meng Qingyin to look at the ground.

Meng Qingyin didn't understand what was going on, so she squatted down as well. "What's going on the ground?"

Qingfeng pointed to a spot on the ground and said, "Master, please look carefully. There are insect eggs on the ground."

Meng Qingyin was shocked. How could the black-winged insect lay eggs in such a short time?

She stared at the ground where Qingfeng pointed for a long time but didn't see anything unusual.

"Use this to look." Qingfeng handed her an instrument similar to a telescope.

Meng Qingyin took it and looked at it. The entire field of vision was filled with densely packed white insect eggs, and there were a huge number of them.

She immediately removed the instrument. "The reproductive capacity of these black-winged insects is truly abnormal."

Qingfeng: "Normally, within half an hour, these eggs will grow into new black-winged insects. But..."

She chuckled and sprayed the eggs. "They won't have a chance to grow up."

Meng Qingyin: "Can the juice of the mutant dragon beard grass also kill insect eggs?"

Qingfeng: "Well, when the juice mixture reaches a certain concentration, both the black-winged insects and their eggs can be eliminated in one fell swoop."

Meng Qingyin smiled happily, "Qingfeng, this time I will help you make a lot of money."

Qingfeng waved his hand, "I'm not interested in making money."

Meng Qingyin: “…”

I suddenly thought of a businessman.

Afraid she wouldn't believe him, Qingfeng continued, "The reason I'm researching mutant dragon beard grass isn't to make money, but because I enjoy studying all kinds of mutant plants. Master, you've provided me with the material to research, and I'll give you the results. As for what you want to do with the results, that's none of my business."

Meng Qingyin felt bad, but she also knew that Qingfeng was not being polite to her.

She said she was not interested in making money - although this sounded irritating, Qingfeng must have thought the same.

"In that case, I won't force you," Meng Qingyin said. "I'll try to grow more mutant plants for you to study."

Qingfeng smiled, "Okay!"

Having said that, both of them knew that the mutation of plants was completely random and uncertain, and would not change because of Meng Qingyin's words.

"Oh no! If I had known the mutated dragon beard grass was so useful, I should have used a seed collector to collect its seeds first." Meng Qingyin said in annoyance.

Qingfeng: "Don't you still have ingots?"

Meng Qingyin also remembered and immediately pulled up Yuanbao and asked it to help pick the mature mutant dragon beard grass.

Yuanbao stood in the pottery basin, looking a little confused. "Squeak?"

Wasn't it eating a peach just now?

Why are the peaches gone?

Meng Qingyin urged, "Yuanbao? Are you awake?"

Yuanbao rubbed his eyes dazedly before coming to his senses.

Without peaches, it would help its owner with work.

"Squeak!" it said to Meng Qingyin.

Meng Qingyin stared at it, "What did you say? I don't understand."

Zizi translated: "Yuanbao said he wanted to eat peaches after work."

Meng Qingyin agreed, "No problem, I'll get you peaches later."

The peaches were picked from the map of Peach Blossom Land and stored in the space ring. There are still quite a few left, and usually only Yuanbao likes to eat them.

After getting Meng Qingyin's promise, Yuanbao recalled the dragon beard grass he had seen and stretched out his hands to pull it out.

Fortunately, the ceramic pot can reduce the size of the plant, otherwise it would take some time to uproot the normal-sized dragon beard grass.

The dragon beard grass is not very big now, and Yuanbao can pull it up easily.

The moment it was pulled out, the ordinary dragon beard grass changed instantly. As it grew bigger, the snail shell-like dragon beard became fatter and greener.

This is a mutated dragon beard grass!

Meng Qingyin reached out and picked up the mutated dragon beard grass, and Yuanbao went to pull out another one.

There are about twenty plants planted in this small ceramic pot, and there are also four other planting pots planted with dragon beard grass.

Yuanbao said nothing and just kept pulling out weeds.

Meng Qingyin said nothing and just kept picking up grass.

Qingfeng said nothing, but looked at the man and the monkey with an auntie smile.

After working for more than ten minutes, all the mature dragon beard grass turned into mutated dragon beard grass, lying quietly on the ground.

Meng Qingyin remembered to use the seed collector in advance this time. She looked at the time and it was just past four in the morning.

If I send a message to Lear now, it would disturb his sleep.

But what if the message is sent too late and Lear rents out the seed collector?

Meng Qingyin's mind was torn between sending the message and not sending it.

Finally, she set an alarm for five o'clock and planned to send it at five o'clock.

Five o'clock, isn't this too early?

Having made the decision, Meng Qingyin stopped worrying about it. She washed the peaches for Yuanbao first, and then browsed the chat area to pass the time.

Unexpectedly, someone had already taken the lead.