If this is successful, it will open up a new way for people to make money.

In the north during winter, vegetables such as cucumbers and eggplants are all sold by the root, and one root is almost worth one or two taels of silver.

Once vegetable greenhouses become popular in the future, the price of winter vegetables will inevitably drop.

But cultivating these is not an easy task and requires a lot of effort, so people can still make a living by growing vegetables in winter.

Gu Lingze and Xie Luocheng first took a look at the built fire room and felt that the temperature had reached the standard.

Because vegetables are not grown outdoors and do not have photosynthesis, they cannot be pollinated naturally. Therefore, vegetables with flowers, such as eggplant, need to be pollinated artificially.

Artificial pollination sounds very high-end, but in fact it is just to gently brush the pistils of the seedlings with a brush to stimulate them, and that is considered successful pollination.

"When the vegetables have grown, we dig them out of the soil, wrap the roots with paper, and cover them with a quilt when transporting them, so they won't wilt during the two-day journey."

Gu Lingze and Xie Luocheng talked as they walked. There were still many aspects that needed to be explored slowly.

"Boss, someone is outside asking to see the Imperial Master." A steward under Xie Luocheng came to report.

The two looked at each other and walked towards the door.

"Le Ming, why are you here?" Gu Lingze was a little surprised.

"Lingze, something happened in the medicine hall."

The three of them sat in the carriage and drove towards the city. Gu Lingze listened to what Tan Leming said and slowly frowned.

"You said that after those people took our beauty pills, they developed large black spots on their bodies?"

Tan Leming nodded with a heavy expression.

People who can afford beauty pills should not do anything to deliberately blackmail others, let alone there are so many people like them.

But Gu Lingze was able to confirm that the problem was definitely not with his medicine.

The three of them rode back to the general's mansion at full speed and prepared to look for Xie Qingwan as soon as they entered the door.

But Qian Bo said that his wife was entertaining guests, so the three of them had to wait for a while.

About an hour later, Xie Qingwan pushed the door open with a bad look on her face, holding a bottle in her hand.

"Lingze, this is the beauty pill that the wife of the Minister of War returned."

Mother Zhang, who was following beside her, had a hint of resentment on her face.

Gu Lingze immediately poured the beauty pill in the bottle into his palm and looked at it carefully, then put it to his nose to smell it, and then swallowed it directly.

"That's right, this is the beauty pill I made."

Xie Qingwan frowned deeply but didn't say anything, but Mother Zhang beside her couldn't help herself.

"The minister's wife's words were so harsh. The lady said she would give an explanation, but she still refused to give in."

Gu Lingze narrowed his eyes slightly, it was obvious that the other party was taking advantage of the situation.

Gu Feirui was the Left Vice Minister of the Ministry of War. As the Right Vice Minister, he was already over 40 years old, but he was on the same level as a young man in his early twenties, so he couldn't help feeling resentful.

"Mother, have the ladies you know also experienced the same symptoms?"

Xie Qingwan pondered for a while and replied: "Only three or four people didn't have it, the rest all..."

"Mother, could you please invite these ladies to your house tomorrow? I have something to ask you."

Xie Qingwan agreed immediately and sent someone to deliver the invitation that same day.

The next day, the ladies who received the invitations came to visit, but two of them did not come.

Gu Lingze entered the flower hall and the ladies stood up to greet him. Three or four of them looked normal, but the others looked cold.

He didn't waste any time and spoke directly: "Madam, can you let me see the black spots?"

Although they were somewhat reluctant, they still cooperated with a cold face.

Two of them grew on their arms, one on the neck, and one on the ankle. They all grew in patches and looked a bit creepy.

After looking at it, Gu Lingze asked, "Apart from these black spots, are there any other symptoms?"

One of them replied: "These places will be very itchy at night, and people can't help scratching them. When they are broken, black blood will flow out."

Gu Lingze narrowed his eyes and fell into deep thought.

Mrs. Wu, who was the best friend of Xie Qingwan, said, "We have also been taking beauty pills during this period, so why didn't this happen?"

When she said this, the other ladies lost their patience. One of them said angrily, "Then this is our problem?"

The scene was tense for a moment. Gu Lingze observed the other people carefully and had a rough idea in his mind.

He took out a few Yang Gathering Talismans from his sleeves and said, "Please put this talisman paper in your personal scent bag, and the black spots will disappear within a few days."

"Really?" asked a lady, and the others were also a little skeptical.

"If not, you can come find me again."

After everyone left, Xie Qingwan hurriedly inquired about the situation.

"Those ladies with black spots have a lot of yin energy, but there's nothing strange about the jewelry they wear."

Gu Lingze looked at her worried expression, smiled and said, "Don't worry, Mom. I will find out the reason."

Gu Lingze first went to find Tan Leming and asked him to close the pharmacy for a few days and rest at home for a few days, and then went directly to Xuanyi Camp.

When they arrived at the place, Gu Lingze briefly told Zhao Chengmo what happened, and the other party immediately expressed his willingness to go back to Beijing with him.

"No hurry, bring another hundred agile Black Clothed Soldiers with us."

Zhao Chengmo immediately passed the order down, and after a while, the team was assembled.

It was already late when they arrived in the capital. Zhao Chengmo went to Huo Jingwu to borrow a place for the 100 black-clothed soldiers to rest in the Jinwu Guard Camp.

Early the next morning, Gu Lingze gave each of them a copper coin tied with a red string and asked everyone to tie it around their wrists.

"You should sneak into the backyards of various dignitaries in the next few days to see if there is anything unusual about their wives."

Then he picked up the copper coin in his hand and said, "If the copper coin on your wrist is hot, bring back to me everything they touched at that time."

"yes!"

Gu Lingze is still investigating, but the issue of the beauty pill has been a hot topic in the capital in recent days.

In addition, the previous events of Donglin Village and the He family were also dug up. Without mentioning a single word about what those people had done, the report described in great detail how Gu Lingze oppressed the people.

Emperor Jing looked at the memorials on the imperial desk and tapped the table with his fingers.

"Gao Yi, summon the Imperial Master to the palace."

As soon as Gu Lingze heard the order to enter the palace, he knew what Emperor Jing was going to do.

Someone also made a memorial during the morning court session these two days. Although the words were roundabout, everyone knew that he was talking about the imperial teacher.

As soon as Eunuch Gao saw him, he immediately went in to report.

Gu Lingze entered the hall and bowed, and Emperor Jing ordered him to take a seat.

"I have heard a little about the beauty pill. What are your plans now?"

Qi Yuanjing's tone was quite gentle, and this sentence was just a question rather than an accusation, which was enough to show his attitude towards this matter.