Since Wang Haoran returned to Chang'an this time, there have often been visitors to the door, and he felt deeply disturbed, so he simply tried his best to let his family deal with distant relatives and neighbors, and those businessmen came to the door to have serious business, so they could only receive them by themselves. Pen | fun | pavilion www. ｂｉｑｕｇｅ。 infoThe so-called business, but also those Chang'an wealthy businessmen want to get a piece of the pie in Zhongcheng, Wang Haoran also welcomes it, the vacant land around Zhongcheng, Puzhou's businessmen can't take care of it, and they will not hinder Chang'an businessmen from developing, so they agreed to come down, and then discuss with Zhao Yuankai after returning to Puzhou.

On Chinese New Year's Eve, Wang Furen's family naturally had to go to the Wang family in Guiyifang to keep vigil. Wang Honggui is very affectionate to Wang Haoran, last Qingming, Wang Haoran deliberately rushed back from Puzhou to sweep the tomb with Wang Honggui, during which he gave Wang Honggui enough face, and now seeing Wang Honggui's high-spirited appearance, he must be the position of the patriarch of the Wang family.

A newlywed woman is going back to her parents' house for the New Year in the first year, and Wang Xinyi is the same, her husband's family is the child of the Cui family who sent a matchmaker and waited for the wrong door. Wang Xinyi, who was already arrogant, was even more domineering after marrying into a famous family, but now she didn't dare to be presumptuous in front of Wang Haoran, and she came over to talk to Wang Haoran after dinner, which made Wang Haoran a little surprised.

"Starling, I heard that Midtown is very lively now, all kinds of buildings are luxurious and spectacular, and the husband of the little sister promised the little sister to take the little sister to the Midtown after the year, and the starling will have to be a guide for the little sister at that time." Wang Xinyi's words make people feel a little familiar.

"Of course you can." Wang Haoran couldn't laugh or cry, he was the eighth king back then, and now he is the starling brother, and the title has changed from a turtle to a bird, it seems that he has grown, right?

"Then the little sister thanked the starling first." Wang Xinyi Yingying said with a smile, "Little sister has one more thing, little sister's husband has always admired the starling, saying that he wants to see you, I don't know when the starling will be free, and the little sister will take her husband to visit?" ”

This made Wang Haoran a little surprised, when Wang Xinyi got married, in view of the image of Wang Xinyi, he didn't even give a gift. Is it really just admiration? Wang Haoran doesn't think so, the Qinghe Cui family, one of the four major families in Shandong, doesn't look like people who can do this, and their every move must have intentions. But I couldn't guess it by guessing, so I could only wait and see what happened, so I agreed.

On the sixth day of the Lunar New Year, Wang Xinyi took her husband to Yiningfang Wang's house as promised. Her husband is Cui Yuanhao, the second son of Master Cui of the Cui family in the capital, and it can be seen in his speech and demeanor that this person is quite talented and sophisticated.

Wang Haoran chatted with him for a while, and he couldn't guess Cui Yuanhao's intentions until they left, and he thought that he was too careful. However, since then, Cui Yuanhao has come to Wang Haoran for three days and two days to contact his feelings, and the conversation is only about irrelevant topics, which makes Wang Haoran wary again, and feels that it is necessary to ask Liu Xiangyu to check the Cui family in the capital.

The tools for measuring the moon required high precision, and the method of spiral counting was used, similar to the micrometer of later generations, and this technology could breed many precision measuring tools, which had a great impact on the manufacturing industry at that time. Before the measuring tools were made, Wang Haoran had already asked people to build a high platform on Zhuque Street, which must have been approved by Li Shimin first. A small table was also built far outside the city, which was more than one meter high and inconspicuous. When the people heard that this was to be built dozens of meters high, there was an immediate uproar, and when there was a lot of discussion in the streets and alleys, Wang Haoran asked people to erect a plaque next to the high platform, which read "How big is the moon".

It is not difficult for everyone to guess the meaning, it turns out that this is to measure the size of the moon! Is this really possible? Many people who are proficient in astronomy and arithmetic feel that it is impossible after researching, but when others ask them for verification, they just don't say anything, you know, this is what the little young master did, if you directly say that it is impossible, if the little young master really measures it, then it will not appear that he is ignorant?

The only one who has a clear statement is Li Chunfeng, who believes that if Wang Haoran can make a high-precision measuring tool, he can indeed roughly measure the size of the moon. At this time, Li Chunfeng was still very famous in Chang'an, and his high attainments in astronomy and arithmetic were also well known. Hasn't the little master's factory always done this business? Then it can be rare little master?

On the fifteenth day of the sixteenth month, Wang Haoran planned to postpone the activity of measuring the size of the moon on the night of the Lantern Festival to the sixteenth night, and the curfew was lifted on the sixteenth day anyway. However, he was worried that it would be cloudy on the sixteenth night, so he had to measure the moon on the fifteenth night.

Lantern Festival night is the most important traditional festival, these three days to lift the curfew, even everyone will come out to see the lights, join in the fun, so these days, Chang'an City can be said to be crowded, traffic jams are inevitable. The most lively place is also near the high platform of Suzaku Street, how can you not come to see the excitement of such an elegant and avant-garde activity as measuring the moon? There are also many merchants and vendors who have moved their business here.

According to Wang Haoran's previous explanation, Chen Jun and the members of the research team had a clear division of labor, one team went to the small platform outside the city, and the other team came to the high platform. After installing the measuring tools on the stage, they adjusted their measuring tools by waving the small red flags so that the moon and the two measuring tools were on the same straight line. Then measure the angle of the outer diameter of the moon to these two places - the ratio of the two sides of the Pythagorean to be exact.

Although this step is simple, it is very cumbersome, not to mention the correction before each measurement, it takes a lot of time to climb the high platform dozens of meters high, not to mention the time it takes to climb the high platform to grind when encountering more timid research team members.

In order to make the measured values more accurate, Wang Haoran asked all the members of the research team to go to these two points to measure once.

The rest is to calculate, this is a big project, at this time there is no computer, every addition, subtraction, multiplication and division has to be calculated stroke by stroke, and when they use the values measured by each group of research team members to calculate the results, they are already in the middle of the day.

On the evening of the 16th, when Wang Haoran and others measured again, there were not many onlookers, because the process was really boring. However, the children of the royal family still came, there was no way, this was requested by Li Shimin, and if you don't come to watch, you will resist the decree.

Wang Haoran summed up the results of the two measurements, took the average of the calculation results of each group, and re-tested them after the members of the research team had rested, and did not hand over the results to Li Shimin until the twentieth day of the first month. The reason why Wang Haoran did not announce it to the public is because his research team is only a non-governmental organization after all, and only by Li Shimin announcing the results can the event appear formal and increase the influence of this activity.