The floating population of more than 700,000 people, naturally not only the floating population in Champa, since the sale of the foreign version of the Zhanbao, has been radiated to the whole of East Asia through Guangzhou and Malacca, even Goryeo, some families in Japan have received the Zhanbao, the news of the opening of the Thang Long Palace has alarmed countless people, I have never seen the palace open casually, some people can't resist their curiosity, they come to Thang Long thousands of miles away, want to see the true face of the palace, after all, the palaces of other countries are not open, in case the Thang Long Palace is closed, Wouldn't that be a rare opportunity that they wasted?

On May 4, the 23rd year of Zheng, the May Day holiday was announced, and the visitor reports of Thang Long Palace were also sorted out, with a total of 500,000 views in Thang Long Palace for three days, with a total income of 5,172 taels of silver. The Pengyu looked very satisfied, it was very rare to earn so much in three days, and the Pengyu asked the palace to keep all the income and give them for daily maintenance, etc., and the Pengyu also gave them an opinion: out of the periphery. Surroundings are actually very common, and it's also a great way to make money. In case someone doesn't believe you've been to Thang Long Palace, you can show off your souvenirs.

The eyes of the directors of the Thang Long Palace Museum lit up, their monarch was really a genius and could come up with a good method every time. On the one hand, the officials of Vijaya restored the buildings of the old dynasty, and on the other hand, the main officials applied for the construction of a large monument in Vijaya, so that future generations could admire the wise and martial arts of the Pengyu, and the Pengyu said with shame: "Where am I wise and powerful? ”

"Your Majesty, don't be modest."

"It's okay to build a monument, but just erect my monument, I'm still alive and well."

The official was relieved to see that he agreed, so he asked, "What does Your Majesty think of the monument?" How do we design it? ”

"The prosperity of our country is due to those soldiers who were born and died for the country, they should not disappear into the dust of history after their deaths, and if they want future generations to remember them, simply build a monument to the people's heroes." ”

The official said: "Your Majesty's idea, I will arrange for someone to design it as soon as possible, and strive to let this monument be erected on the land of Cham as soon as possible." ”

He nodded, and the official took his leave and left.

On May 5, the twenty-third year of the Zheng Dynasty, the scholars who went to various places to investigate returned to Vijaya, and the historians sorted out the history from the Fifth Dynasty to the future, because the Cham people do not remember the reason, most of the historical materials are found from the northern Zhanbei region, before the Fifth Dynasty, although there are rough records, it is impossible to find out what happened in which year, and can only roughly record which period of time was which monarch was in power.

He originally thought that it was quite good to find one or two hundred years of history, but he didn't expect that even the history of the Tang Dynasty could be found, these historians also compiled these histories by year, compiled into a history, and arranged for them to sort out the history of the Great Yue Kingdom, the Great Yue Kingdom has a good habit of recording history, most of the history is recorded in the Thang Long Palace Museum, as long as it is slightly integrated, it can be used directly, but there are still part of the historical truth hidden in the world, It had to be checked repeatedly before it could be included in the book.

Geographers recorded the situation of many rivers in the Champa country, the information of some mountains, they also made a three-dimensional model of the Champa places, this is a very important thing, can not be obtained by the enemy country, make Pengyu let people save it in the treasury, in addition to the three-dimensional model, they also made the first map of the Champa, now what makes them embarrassed is, how to measure the height of the long mountain, they can not always bring a meter ruler to measure it, at present they know that Lailing is the highest peak, but they can not confirm how long they are.

He smiled and told them, "The Pythagorean theorem is needed here." ”

"The Pythagorean theorem? What is that? "They said they hadn't heard of it.

"If you have time, you go to Pandulanga University to study and study, there is a collection of books in the library "Nine Chapters of Arithmetic", Shang Gao of the Zhou Dynasty discovered this law, Shang Gao once discussed with Zhou Gong the problem of "hook 3 strands, 4 strings and 5", and later he summed up a set of laws, so it is also known as Shang Gao's law. ”

"It's because we're lonely." Let you study, you prefer to raise pigs.

"You need to measure the distance from the horizontal plane to the highest point of the mountain peak to the normal ground, and then measure the angle of the ruler and the vertical direction, and multiply the distance by the sin angle."

They looked confused and said, "Your Majesty, we are lonely and unheard, please make it clear to Your Majesty." ”

Ji Pengyu sighed and said, "That's it, you go and measure the distance between the highest point of the mountain and the ground this time, and then record the angle between them for me, and I will solve this problem when the time comes." ”

The geographers were naturally ashamed, they were well-read, but they did not know what the Pythagorean theorem was that they were talking about, but they did not believe that the height of the mountain could be measured only by angle and length, although their majesty was indeed very knowledgeable. After they finished measuring the data, they were going to spend a year and a half in the library of Pandulanga University, and the nine-chapter arithmetic was their primary goal.

On May 10, the twenty-third year of the Zheng Dynasty, the Yuan envoy group arrived at Vijaya, in order to prevent the children of the nobles from being abused, they wanted to rescue everyone as quickly as possible, and the two sides conducted fierce negotiations on this, and finally released tens of thousands of nobles captives at the price of 5 taels of silver per person, and they naturally also asked for the rest of the Han people to be released as gifts, and the Pengyu refused.

Most of the soldiers adapted to the life of Cham a little, they thought that life in Cham was what they had been looking forward to, so they were 'happy' and did not want to go back to continue to serve the Yuan army, so they naturally agreed, and also allowed their families to settle in Cham, they were naturally moved, they did not expect that they would accept the integration of different races.

In the end, the Han who wanted to go back were also given to the Yuan envoy by the Pengyu and arranged for these people to return to China.

The Pengyu is satisfied, before half of this month, there is already an income of nearly 70,000 taels, which is almost catching up with one-third of the income of a year, it seems that the war can indeed make a fortune, the more the Pengqiao sighed, the more he fights, the richer he may be in this way.

In order to sell the equipment of the Yuan army at a high price, Zheng Pengyu specially prepared an auction to publicize it to various countries through the newspaper and attract all countries to buy it.