When observing the shadow of the sun to record the time, the reference used by Ah Ah is the bamboo skewer in the headstock, which is one inch high, that is, 5 cm high.

In later generations, the piano did not use bamboo sticks, but used a horizontal log as a string frame, which was called Yueshan.

The essence of the guqin is lost.

Of course, there are now nine 5 cm long bamboo sticks on the headstock of Ah He, but when Ah Ah watched the time, only one of the bamboo sticks was used.

The rest are useless.

She saw that in this way, she could use the rest of the rope as a reference line for the shadow of the bamboo stick.

For this reason, on the piano of later generations, there is finally the name of the crown, which is the law of the south, and the relationship between the yuan cun and the view of the south can be seen by observing the crown for this reason.

So much so that 'guan' uses the 'crown' sound.

The word "time" explains the origin of time.

It is precisely because this bamboo stick is only one inch high, for this reason, one hour is composed of 'day and inch'.

It's just that the real inch of Huaxia is 5 centimeters, which is exactly the length of Gen's mother finger.

After understanding the word "ten", Zhang Jingtao also has a little understanding of the word inch, and there is no doubt that the inch has divided the number "ten" into two, and uses a tick to indicate that it is only half and gets the meaning of the number five.

This hook naturally has the meaning of nailing into the bamboo board.

The method of recording the hour is that every time he walks to one of the five twine ropes in the shadow of the bamboo stick, he will carve a point on the intersection of the sun shadow and the hemp rope as the time point.

These intersections are used by Ah Ah to represent the time points of the sun with a small circle representing the sun.

It's like marking a small tadpole on a staff that doesn't have a long tail yet.

When Ah added the sun shadow and marked it as a tail, the stave was almost formed.

Of course, at that time, Ah Yu didn't think about playing the piano, but it is conceivable that foreigners who don't know that the stave has this function now are obviously just stealing the stave, but Gen doesn't know the source of the stave.

After that, Ah He connected these tadpole time points one by one by scribing the line.

And these steps, which are complicated to say, turn out to be clear at a glance.

Because what Ah Yu got was half of the gossip line drawn on the staff.

Although this gossip is not regular.

And because the angle of the sun relative to the earth changes, the length of the shadow of the sun also changes all the time, and after recording a few times, the figure on the five-stringed piano becomes half a spider web.

It seems that Ah, the silk immortal, doesn't want to do it, and wants to change his career to be a silk immortal.

And after hearing Ah Yu talk about this method, the shock in Zhang Jingtao's heart can be imagined!

He never imagined that in this barbaric and ignorant wilderness that all modern people think, he would be able to see the real high-tech civilization from time to time, and learn about astronomical knowledge that modern scientists do not understand at all.

Because Zhang Jingtao has already seen that such a spider web is extremely useful, with which the change of the angle of the sun relative to the earth can be clearly observed, and even, the relationship between this angle and length can be carefully calculated later, and the Pythagorean theorem can be obtained.

Recently, Ah felt that the time span of the five-gun line recording was too large, so between the five-gun lines, a four-gun line was added.

In this way, it is enough to observe the shadow of the sun in great detail.

Looking at the gossip lines drawn on the score after the five-stringed piano was transformed into a nine-stringed piano, it was even more like a spider's web.

Moreover, this point also shows that the source of the staff is Huaxia, because when the line of the staff is expanded, this expresses the score of 7 scales, and only the Chinese still call it the staff, that is, only the Chinese know that it originally only had the five lines.

The rest of the foreigners all only call it a sheet music or something like that.

Yes, they don't use staves by name, they use all the sounds, they use words that mean 'sheet music,' and you don't want to see the word five in staves.

Naturally, she didn't know that the civilization she created was distorted and misappropriated by later generations.

Ah, I only explained in detail how the time came.

However, after the staff was expanded to nine lines, after counting the beginning and end points of the nine strings, he got 11 time points, and he also got ten hours from 0 to 10.

And, when calculating time with the shadow of the sun, because the cobweb had already been drawn, she thought that the north point at the bottom of the cobweb actually corresponded to the middle of the day, so she pointed the tail of the piano to the south, so that the north point of the spider web became the south point, and looked backwards.

So, when you look at the half of the spider web, it's like looking at the upper semicircle of a clock.

This is where the hour comes from.

That is to say, the time, because of the use of the method of the shadow of the sun, therefore, the shadow of the time, in terms of the real position, represents the night, for this reason, the time is reversed for daytime timekeeping, it becomes a kind of image usage, so there is the name of the hour.

This is the meaning of the water body in the pool, which rises into the air with the change of temperature and turns into steam, forming a barrier, reflecting the sun's rays, forming the meaning of the rainbow, and also the meaning of the air on the ground rising and shaking due to the heat, refracting light and shadow, and forming the image of Chen.

In this regard, Ah Ah has an observation, and she is the Tatsu image that was produced on the ground in the summer, and she calls it Tatsu.

This Chen, in fact, is taken from the sound of 'dust', because Ah He thought it was a mirror image of the dust on the ground after it was heated and rising.

The ancients also often called time Chenguang.

For example, what is the light now?

This is also the origin of the word Chenguang in the Gusu dialect, a cultural dialect that has changed its voice.

The pronunciation of the dust sound is: eat grace, that is, ch, e

Among them, this grace sound, for Ah He, has the meaning of swallowing, that is, the meaning of chewing until the food that can be swallowed is very small.

Therefore, due south point has become the starting point of the time determined by Ahma0.

That is to say, it is precisely because Ah Ah uses the orthographic guide method to time, so Ah Ah uses the position of 12 o'clock on the clock as 0 o'clock.

Of course, Ah Ah doesn't think that Zhengnan is 12 o'clock at the moment, she only thinks that it is 0 o'clock.

In this way, she counts the clockwise change of the shadow of the sun, and she has the 0 to 5.5 hours on her right hand.

Then, from morning to noon, count as five hours from 0 to 5 on the left hand.

And at the beginning of the east in the morning, a 0 is also drawn, which is considered to determine another 0 point, indicating that the sun has just risen.

The reason why there is no reversal of time is because Ah He doesn't think that time can go backwards.

For this reason, the word "day" is added to the word "chen", which is used to indicate that the sun has just risen from the night to the chen area, which can represent the morning.

For this reason, the word 'Fu' is derived from this practice of measuring the day, and this word is the meaning of 'dividing one day and separating and one' to obtain the replica, and for this reason, this anti-text also has the meaning of replication.