Two months later.

Imperial capital, Nanjing City.

On the street, people come and go, very lively, and peaceful.

Now that Daming is thriving, the people are naturally happy with their families.

Tongfu Inn.

The most luxurious inn in Nanjing, on the second floor, in the tea pavilion room, Zhu Zi sat by the window, watching the people below talking and laughing, and couldn't help but smile.

If only it had been like this, it would have been good that the people would always be happy and healthy, but unfortunately, in a few decades, this peace will be broken.

At the same time, on the street, a familiar voice appeared, Zhu Zi looked at the familiar figure, and walked into the Tongfu Inn from the main entrance.

It didn't take long for the familiar voice to walk upstairs, and he glanced around, his puzzled target, as if he was looking for someone.

Zhu Zi waved over there, and after the person who came up saw it, his face suddenly changed, and he walked towards Zhu Zi quickly.

"Big brother, long time no see."

Looking at the person in front of him, Zhu Zi also smiled and said.

This person is none other than Zhu Biao, the crown prince of the dynasty, and at the same time, Zhu Zi's eldest brother.

"Eighth brother! It's really you! ”

"Aren't you in Qiongzhou? When did you come back to the imperial capital? ”

Zhu Biao asked a few words excitedly, and couldn't believe that Zhu Zi had really come back.

Zhu Zi, who is in Qiongzhou, is thousands of miles away from the imperial capital, and it is very difficult to come to Qiongzhou, the last time Zhu Di went to Qiongzhou, when he came back, it took him almost three months to arrive at the imperial capital.

The last time Zhu Di came back, from Zhu Di's mouth, he heard about Zhu Zi's life, he was relieved, and he didn't ask about it, but yesterday, he suddenly received news that Zhu Zi wanted to see him, and the agreed location was here.

"I just arrived in the imperial capital in the past few days, I haven't seen my eldest brother for a long time, I miss it very much, and the first thing I do when I come back is to find my eldest brother."

Zhu Zi said with a smile.

A trip from Qiongzhou to the imperial capital, with the current transportation, it is too difficult, along the way to the whip, one person, it took two months to arrive.

He almost never stopped much alone, there was sea and land, he took a boat, and if there was no sea and land, he rode a horse and tossed for a long time, which can be regarded as arriving in the imperial capital.

This time he came to the imperial capital, and naturally came with an important task, otherwise he would have come to the imperial capital once every two months, and he would have come in person, wouldn't he have nothing to do when he was full.

"Good! We two brothers, we haven't seen each other for a long time, we must get drunk today and drink to our heart's content. ”

"I heard that you are in Qiongzhou, you are doing well, Zhu Di went to your trip, I am full of praise, I heard that I also got a lot of good things from you."

"If I have a chance in the future, I will also go to Qiongzhou to see how great your magical powers are! Ha ha! ”

Zhu Biao nodded heavily, with a smile on his face.

Originally, he said that he and Zhu Di would go south to Qiongzhou together to see how Zhu Zi was doing, but he had too many things to do, and he really couldn't spare time, so he could only let Zhu Di go alone.

It's not that he wants to be so busy, but there is no way, Zhu Yuanzhang wants to train him as an heir, so there are many things that need him to do.

"Big brother is always welcome to come."

"Drinking, don't be in a hurry, this time I came to the imperial capital, mainly to do something, I just haven't seen my eldest brother for a long time, and I want to see my eldest brother."

Zhu Zi also directly stated the purpose of coming to the imperial capital this time.

Talking to Zhu Biao, he doesn't have to spare so many bends, what he thinks, just say anything, don't worry about it so much, the intrigue between the royal family does not exist in them at all.

"Oh? Come here and do something. ”

"If you need anything, just mention it, if the eldest brother can help, he will definitely help."

Zhu Biao showed a puzzled look, but he was still very measured, and he didn't ask Zhu Zi what the specific matter was, as the eldest brother, and the younger brother had needs, so he definitely couldn't help it.

"I can't hide it, big brother, I may really want to trouble you."

"I'm afraid that there are not many people who can do it all, so I can only ask you for help."

Zhu Zi smiled bitterly, his needs really can't be solved by ordinary people.

In the entire Ming Dynasty, there are absolutely very few people who can complete these two things at the same time.

Anyway, in the past two days, he asked around the imperial capital, but he didn't ask anything useful.

"You kid, you saw me coming."

"Tell me, what's the matter?"

Zhu Biao smiled, and saw through Zhu Zi's mind at a glance.

If it was a very simple thing, it was estimated that he would not be looking for him, but it was a rare thing, it should be early in the morning, and I would have been eyeing him and waiting for him to come.

"I came to the imperial capital this time, mainly for two things."

"First thing, I want a recipe for making gunpowder, and as you know, gunpowder is hard to find, let alone a formula, so I can only trouble you to help me find it."

"The second thing, and also an extremely important thing, is much simpler than gunpowder, but I don't have this relationship, I haven't asked, some time ago, I found an iron ore vein in Qiongzhou, and the iron ore vein has it, but there is no smelting method in Qiongzhou, no technology, and iron alone is useless, with your influence in Daming, this should not be difficult, mainly the formula of gunpowder, it may be a little difficult."

Zhu Zi didn't have any ink at all, and said his needs straight to the point, without saying a word, without any shy side.

In his opinion, Zhu Biao is not thin on him and will not do anything to pit him, and he can also truthfully tell Zhu Biao all his needs.

"The recipe for gunpowder? Is there an iron ore vein in Qiongzhou? ”

After listening to this, Zhu Biao's eyes widened, and he looked at Zhu Zi in surprise, his tone full of surprise.

"Smelting technology, there is no problem, Qiongzhou is also part of the Ming Dynasty, iron ore veins have been discovered, they need to be developed, and they should be helped, this is not difficult."

"But the formula of gunpowder is not a trivial matter, I want to know, what do you want the formula of gunpowder to do, no, to be precise, what do you want gunpowder, what do you do?"

After hesitating for a while, Zhu Biao also asked.

The method of smelting, it is a small matter, there is no difficulty, but gunpowder, but a big thing, in the entire Ming Dynasty, is a big thing, since gunpowder can be used to make firearms, Daming has attached great importance to this, this point is the clearest, Zhu Zi is now asking this, so he has to think more.

"If you want gunpowder, you will naturally make firearms, I promised my father and the emperor, and said in front of the civil and military forces of the Manchu Dynasty that within three years, the trouble of the Haikou can be solved, if there is no means, what can I do to solve the problem of the Haikou, firearms, is one of my means."

"Iron, after Qiongzhou masters the smelting technology, it can be self-sufficient, but gunpowder is still in short supply, if you want to solve the problem of gunpowder, you must get the formula of gunpowder, big brother, only you can help me."

Zhu Zi said with a serious face.