Wang Haoran summoned a clever clerk from various department stores and asked Chen Jun to teach them how to repair the pendulum clock. Pen & Fun & Pavilion www.biquge.info Chen Jun taught very carefully, where it is easy to break, how to repair it if it is broken...... Wang Haoran couldn't stand it anymore and interrupted: "Don't say so much, you just teach them how to install it." If something is broken, replace the parts, replace the parts that may be broken, and replace them all if they don't work. Each part is clearly marked with a price written on the list, and after the warranty period, it will be charged according to the list. ”

"This ...... Count you ruthless! Chen Jun said disdainfully.

"What is this, I regret that the materials used to make this pendulum clock are so good."

"It doesn't cost much, you dare to sell a pendulum clock for dozens of taels of silver, and you still need to care about this little money?"

"You don't know that the number of people who can afford a pendulum clock is very limited, and when the pendulum market is saturated, what money can be made by selling pendulum clocks? If you still want to rely on the pendulum clock to make money for a long time, you can only rely on later maintenance. But if the materials are used too well, the pendulum clock will not be broken once in ten or twenty years, so what money can be made? ”

"The merchant is really a trickster!" Chen Jun's disdain for Wang Haoran has reached a new height.

More than a month later, pendulum clocks began to be sold in department stores in Puzhou, Luozhou, and Chang'an. However, there is also a small problem, that is, how do customers check the time after they bring the pendulum clock home? Wang Haoran's solution is to make something similar to a combination of a compass and a sundial, which is called a school disk. When the clerk comes to install it, place the school disk horizontally under the sun, and then turn the school disk so that a certain scale on the school disk coincides with the compass pointing inside. There is also a thin vertical needle on the school board, and the time is determined by the scale indicated by the shadow of the thin needle. Although the timing of this proofreading is not very accurate, it is not a big problem, anyway, the ancients did not need too accurate time. The smallest unit of time commonly used in ancient times was "quarter", and a quarter of an hour was equal to fifteen minutes in later generations.

The cost of the pendulum clock does not cost a lot of money, but the people of the Tang Dynasty are generally poor, even if the price of the pendulum clock is not high, the vast majority of people still will not buy it, because they don't need it at all, or look up to see how high the sun rises, and it doesn't cost money. So no matter from which point of view, the pendulum clock must become a luxury, an ordinary pendulum clock four taels of silver, and the nobler ten taels of silver can't be bought, let alone a limited edition.

However, there is no need to worry about how the pendulum clock does not sell, compared with later generations, the rich people of the Tang Dynasty are also willing to spend money, but they are no worse than the rich in later generations, and it can even be said that they prefer to pay attention to pomp and circumstance.

As for whether the pendulum clock will be imitated, Wang Haoran is not worried at all, others do not have his advanced equipment. Even if others develop production equipment in the future, Wang Haoran may already be selling pocket watches and watches at that time.

The appearance of the pendulum clock caused a sensation in two major cities almost in one day, not only because of the strangeness of the pendulum clock, but more importantly, the operation principle of the pendulum clock. What is a sketch? Everyone will only be amazed; What do spirits count? The people of the Tang Dynasty were not stupid, given enough time, anyone could make it; What is a bicycle? Isn't there one more chain than a carriage! The people's wonder passed for a while. The pendulum clock is different, and the physical principles involved in it can be said without exaggeration to say that it opened up another world for the Tang Dynasty. Before the Tang Dynasty people made very little use of nature, the most representative ones were nothing more than waterwheels and Sinan, and only after seeing the pendulum clock did they know that the original natural phenomena could still be used so finely.

Li Shimin was also very interested in this, and after learning that there was such a thing, he hurriedly ordered someone to buy one and come back.

A eunuch was ordered to hurry to the West Market department store, but learned that the pendulum clock had been sold out, so he could only make a reservation first.

"If I book now, when will I get the order?" The eunuch asked, although he spoke very arrogantly, but he did not dare to be unreasonable, the emperor has always boasted that he loves the people like a son, if he is known by the emperor in front of the people, he will definitely be scolded.

"Half a month." The department store shopkeeper apologized. During this time, he was very aggrieved, and there were many nobles who shouted in front of him, and when they heard that they had to wait so long for a reservation, they all pointed at his nose and scolded, and they all wanted to put their appointments in front. So, my dad is so-and-so, and I can hear this kind of cheating dad from time to time. The shopkeeper was full of contempt for these people in his heart, but he could only endure it, telling them that His Royal Highness King Yue had been lined up for half a month before these people quieted down.

"Our family can't wait that long, so let's leave one for our family when the next batch of goods comes."

Here's another one to cut in line! The shopkeeper is big, but he can be regarded as experienced, so he politely refused: "I'm really sorry, others ordered it first, and the villain can't be dishonest, right?" His Royal Highnesses the Four Princes are all in line for half a month. ”

The eunuch was not angry, and said with a smile: "But our family is at the behest of His Majesty!" ”

"......" Even the emperor came to join in the fun, the sky and the earth are big, the emperor is the biggest, and the shopkeeper was shocked this time, "This villain can't be the master, or the villain will inform the owner, if the owner can rush the goods, then it will definitely be kept for His Majesty first." But even so, the next batch of goods will not arrive in two days, and I hope that my father-in-law will explain it to His Majesty. ”

"Okay then, we'll come back another day." The eunuch muttered in his heart, who is this owner? The shelf is quite big, but he is not in a hurry, anyway, there is no one in the world who does not give the emperor a son. He didn't know that this department store belonged to Wang Haoran, and not many people knew about it, because Wang Haoran was worried that the people of Chang'an would still remember that he had "wasted" food and affected the business of the department store.

The emperor wants to set the clock, Wang Haoran naturally wants to actively prepare one for him, the copper mine has not yet arrived, and he has to serve it well.

Li Shimin is also a curious baby, the eunuch brought the pendulum clock back and carefully observed, the eunuch next to him reminded that the pendulum clock needs to be proofread time, so he ordered the department store to send a clerk to proofread the pendulum clock.

Li Shimin saw that the pendulum had not stopped for a long time, so he asked the department store clerk curiously: "Do you know how this works?" ”

"The Emperor...... Hooray, grass ...... The grass people know. The clerk, who was trembling and kneeling, stammered in reply.

"Then turn on this pendulum clock and take a look." Li Shimin originally wanted the clerk to explain it to him, but seeing that he was nervous like this, he simply asked him to open the pendulum clock and see it himself.

"The Emperor spares his life! The grass people didn't ...... If you don't bring tools, you can't open it. The clerk panicked, I often heard that the companion is like a tiger, for fear that if he provokes the emperor a little, he will confess here.

The eunuch next to him couldn't stand it anymore, and quietly reminded: "You want to call Your Majesty." ”

"Then you can explain it to me." Li Shimin was also helpless, so he had to catch the ducks on the shelves.

Waiting for the clerk to explain, Li Shimin was still confused, and it seemed that there was more fog than before.

"Father, it's better for the child to explain to you." Li Tai, who had just come in, also heard the clerk's explanation, which almost confused the principle he already knew.

"Do you know how it works?" Li Shimin asked in surprise, and then motioned for the eunuch to take the clerk down.

"The child went to the department store before and saw the pendulum clock drawings that Haoran gave to the shopkeeper of the store...... Li Tai understood the pendulum clock principle very thoroughly, and the explanation was clear and easy to understand.

"So how do you make sure that the pendulum swings back and forth for exactly one second?"

"This child is not clear, or the father will let the child go to Puzhou to find Haoran and ask for clarification?" Li Tai took the opportunity to request to go to Puzhou again.

Li Shimin knew that his son was smart and clever, but he didn't expect that he still underestimated his son, he could know the principle with just a drawing, and he also knew the proportion distribution of gear drives, it seems that the fourth prince is also very talented in this regard. Thinking that Li Tai had asked him to go to Puzhou many times, he simply agreed this time, because he vaguely felt that the principles contained in it might be applied to other aspects, and this was the first time he had come into contact with a fully automatic thing in the true sense!