At the beginning, his wife came to him, and he became rich by selling kidney treasures.

Seeing Ren Hao like this, Wen Yan frowned and asked, "Ren Aiqing, is the question I asked ridiculous?"

"No...no."

"I was just choked." Ren Hao shook his head quickly, not daring to say anything ridiculous.

But it is understandable to ask such a question in this era.

After all, the conditions in this era are not like those in the future, and much astronomical knowledge is mostly based on conjecture and speculation.

Modern people know that the earth revolves around the sun, but for people of this era, the sun, like the moon, revolves around the world.

The sun and the moon are hidden somewhere in this world.

It is actually very difficult to answer the emperor's question.

Even if Ren Hao clearly told the emperor that the world is round and has no end, the sun sets in the west not because it hides behind some mountain, but because of the rotation of day and night in the eastern and western hemispheres.

However, due to the limited cognition of the times, the emperor might not necessarily understand what he said.

So in order to avoid unnecessary trouble and to keep a low profile.

Ren Hao directly told the emperor that he had not seen where the sun hid after setting, perhaps to the west even farther away than the west.

"Is that so?" Wen Yan nodded with a look of regret in her face. She had thought that the knowledgeable Ren Hao could help her solve her doubts.

"Your Majesty, if there is nothing else, I will take my leave." Ren Hao stood up and said.

"Go away." Wen Yan waved her hand. She was also tired.

"I'll take my leave." Ren Hao bowed and walked out.

Just as Ren Hao closed the door for the emperor and was about to leave the palace, he was stopped by a voice: "Master Sikong, please stay."

The person who called him was none other than the old eunuch who served the emperor.

"Eunuch, what can I do for you?" Ren Hao turned around and asked.

"Lord Sikong, you can't be so forgetful, right?" The old eunuch came over and laughed.

forgetful?

Ren Hao was suddenly stunned, and he couldn't remember what he had promised the old eunuch before.

"Hey, it seems that Lord Sikong is really a forgetful person. He has forgotten what he promised me so quickly." The old eunuch sighed.

Ren Hao then remembered that he had intended to bring a pot of thatch for the old eunuch.

"I'm so sorry, sir. I've been so busy these days that I forgot about this."

"But don't worry, eunuch. I will definitely bring it to you next time." Ren Hao bowed to the old eunuch and smiled apologetically.

"Lord Sikong is very busy every day, I understand."

and so.

"Don't worry about such a small matter. When it's convenient for you, just bring it to me." The old eunuch looked understanding, but he was actually very unhappy.

"I'll definitely do it next time." Ren Hao said with an apologetic smile, and was then escorted out of the palace by the old eunuch.

Ren Hao got on the carriage and looked at the black horse pulling the cart, and suddenly he thought of Heifeng.

"Zhang Tong, how is Heifeng now?" Ren Hao asked casually.

"Master, I have completely tamed Heifeng. If you want to ride him, I will bring him to you when I get back." Zhang Tong said as he drove the horse.

"I'm just asking casually." Ren Hao waved his hand and asked whether Zhang Tong had paired up with Heifeng.

After all, Zhang Kuai was thinking about Chen Fei very much.

"Master, there is no need to rush this matter. I have tried several times before but all failed. We still have to wait for the right opportunity." Zhang Tong replied.

"Well, thank you for your help." Ren Hao nodded, then sat in the car and closed his eyes to take a rest.

About half an hour later, Zhang Tong drove back to Ren's house.

At this time, the joint examination in the palace was still going on, but with the lessons learned from the past, these talented people from outside the capital were extremely honest, and no one dared to try to cheat.

Just when Ren Hao was about to go back to his room to catch up on some sleep, Cai Lun walked up to him and said, "Master, there's a letter for you."

"mine?"

Ren Hao was stunned, and then Cai Lun took out a letter from his sleeve.

In ancient times, letters were all written on bamboo slips for the convenience of preservation.

Moreover, the exchange of letters in this era was not as convenient as it is today. Even within the Central Plains, it often took several months or even longer to send a letter back and forth.

As for places outside the Central Plains, it is even more troublesome.

This letter was written by Cao De, and he had no idea how many people's hands it passed through before it reached him.

Fortunately, the fire seal on the letter is still there, which means that the letter has not been opened by anyone.

Ren Hao returned to the dormitory and opened the letter from Cao De.

The beginning of the letter was all Cao De's nonsense. He wrote something like, "I have been separated from my lord for more than a few months, and I wonder how my lord has been doing recently and whether he is in good health."

Ren Hao simply ignored it and looked at the key points in the letter.

"My lord, the Emperor of Wei is offering donations for official positions. Please give me 30,000 taels of silver so that I can serve as an official in Wei."

This so-called donation for an official position was simply a means for the imperial court to openly solicit money from merchants.

Whoever donates more money will be elected.

Moreover, the official positions offered by the court were all positions in the Ministry of Rites. After all, the Ministry of Rites was the least powerful institution among the six ministries.

Xu Tianyin was able to reach the position of Minister of Rites thanks to donations.

After reading the letter, Ren Hao thought for a few seconds and decided to send someone to deliver silver to Cao De.

Although the positions in the Ministry of Rites have no real power, it is better than having no official position at all.

After all, the purpose of Ren Hao sending Cao De to Northern Wei was to infiltrate the palace as an undercover agent and act as a traitor to the Han court.

Ren Hao tore apart the letter, threw it into the basin, and burned it with a tinder.

This kind of thing is not easy to keep.

"Cai Lun." Ren Hao called out after burning the letter.

"I'm here." Cai Lun pushed the door open and entered the room.

"Go to the silver vault and take out 50,000 taels of silver, then go to the trading company to call Hui Lixue back." Ren Hao ordered.

"Okay, sir." Cai Lun nodded and did what Ren Hao instructed.

After a while, Eriyuki came back and asked, "Master, do you have something to talk to me about?"

"I need you and Shi Huan to go to Northern Wei with 50,000 taels of silver and deliver the silver to Mr. Cao." Ren Hao nodded.

"I can handle this kind of thing by myself. There's no need for a little kid to follow me." Eriyuki said coldly, fearing that the little kid Ishihuan would hold her back.

"Although Shi Huan is young, he is very strong. It's a good opportunity for him to hone himself." Ren Hao continued.

"That's exactly what I'm worried about. If he encounters any danger on the road, I won't have the time to protect him." Eriyuki continued coldly, thinking that Ren Hao was just looking for trouble.

Even if a little kid is very powerful, how powerful can he be?

This is called training, but when he is really in danger, he still has to rescue himself, which causes trouble for himself.