"Zhao Tianming, can you give me this painting? I will pay for it at the market price. ”

Liu Musheng next to him said suddenly, with an urgent expression on his face.

"Lao Liu, why are you interested in collecting antiques?"

Yang Quan looked at his expression and felt a little strange, he didn't seem to pay attention to these things before.

"I wanted to buy it back for my dad, and he was definitely interested in it. ”

Liu Musheng said that his father likes to collect some antiques, and Yu Youren's works are also very fond of them.

It's a pity that the national memorial is not genuine, otherwise he could have secretly surprised him.

"You want? ”

Zhao Tianming said that he originally wanted to get back the auction house, but now the auction house lacks some precious antique cultural relics.

The biggest source of fame of an auction house is a steady stream of auction items, and it is also the core of maintaining the operation of an auction house.

However, a large auction house, there is no shortage of this half-sheet work, Liu Musheng is a friend of Qi Tengyun, and it is nothing to give it to him.

In the end, Liu Musheng took the initiative to raise the price by one million, and Zhao Tianming was also willing to laugh, he would not take the money anyway.

There are still a few picture scrolls left, which are calligraphy and paintings from the Republic of China, but the author is not very famous and not very valuable, so Zhao Tianming put it away first.

"Old headmaster, is there only this box? Is there anything else? You guys, won't you just bring this thing back?"

Qi Tengyun was a little addicted, and looked at the old principal, as if he saw a treasure, waiting for everyone to dig up.

"There may still be, but I can't find it, I don't remember anything for a long time, you can find it yourself!"

The old headmaster said, so chaotic, let alone now, at that time he couldn't tell what was there.

Several people searched around, searching for something that looked like antiquities, and even some old calendars from the past, and showed them to Zhao Tianming for identification.

It's a pity that antiques are so easy to find?

Walking around the huge utility room, Zhao Tianming suddenly set his eyes on the lower floor of a shelf, where a sundial was placed.

"Headmaster, this sundial shouldn't be used in school, right?"

Zhao Tianming said that in his impression, he had never learned this thing, let alone seen the model, this kind of physical model, what he saw in the classroom was probably only a globe.

When they were young, they didn't learn geography until junior high school, but now it seems to have changed, and they have it in elementary school.

"There's just a few maps of the world and a globe, and the globe was bought by this kid. As for whether someone got it back before, I don't know, you can take it out and take a look. ”

The old principal pointed at Qi Tengyun and said, although this kid didn't care about studying before, but after he came back, he still had a lot of heart and helped the village do a lot of practical things.

He never stands on the moral high ground and asks others to do something, and he doesn't have to donate money if there is money in the village, but he is still very happy that the young man has this heart.

Ignoring the dust, Zhao Tianming lay down and removed the sundial, wiped off the dust, and found that this thing was actually made of green jade, which was a bit heavy-handed.

The name of the sundial is composed of the words "day" and "sundial". "日" means "sun", "dial" means "shadow", and "sundial" means "shadow of the sun". Therefore, the so-called sundial refers to a kind of timekeeping instrument that used the sun's shadow to measure the time in ancient times, also known as the "daily gauge".

The principle is to use the direction of the sun's projection to determine and divide the time, usually consisting of a sundial needle and a sundial face.

During the day, the shadows cast by the objects illuminated by the sun are constantly changing, the first is the length of the shadows, the shadows are the longest in the morning, the shadows gradually become shorter as time goes by, and then they become longer again after noon.

The second is that the direction of the shadow is changing, because we are in the northern hemisphere, the morning shadow is in the west, the midday shadow is in the north, and the evening shadow is in the east.

In principle, it is possible to time according to the length or direction of the shadow, but it is more convenient to time according to the direction of the shadow. Therefore, it is usually timed in the direction of the shadow.

The method of using sundials to keep time is a major invention in the field of astronomical timekeeping, which has been used by mankind for thousands of years.

Sundials can not only show the time of day, but also the solar terms and months. However, its disadvantages are also obvious, it is bulky and cannot be used when there is no sunlight, such as cloudy days and nights.

Therefore, it is not enough to use a sundial to keep time, but also to match it with other types of timers, such as water clocks.

Sundials can be divided into horizon sundials, equatorial sundials, polar sundials, vertical sundials, projection sundials, folding sundials, contour sundials and so on.

The sundial in front of you, supported by a chassis, the engraved disc tilted in mid-air, and a pointer running vertically through the engraved disk, is an equatorial sundial.

The equatorial sundial, also known as the oblique sundial, is the most important and common sundial in the sundial world, and it is also the most classic and traditional astronomical observation instrument in ancient China.

In addition to practicality, it is also used as architectural decoration.

Sundials are generally made of stone sundials, metal sundial needles, and stone equatorial sundials made in the Qing Dynasty are preserved in the Forbidden City in Beijing.

However, the sundial in front of me is made of green jade, and its sundial is only more than ten centimeters in diameter, which is larger than a palm, and the scale on it is clearly visible, which is extremely exquisite.

Zhao Tianming is a little strange, this sundial is made like this, could it be that the ancients made it into a decoration?

The sundial should play a role in the sun, and the material selected should be able to resist the scorching sun.

But if it is an ornamental plant of ancient literati, such a block is a bit too big, right?

And it doesn't seem to have left any marks on the surface, not even any sobering verses of "every inch of time and every inch of gold", "day after day, tomorrow is so much".

"This sundial is very beautiful! It seems that a whole piece is carved out of green jade?"

Zhao Tianming slowly wiped the surface clean, revealing the true face of Lushan, and the eyes of the others suddenly flashed with surprise.

The sundial on the table is very delicately polished, and the scales on it are so delicate that those of them who are more or less short-sighted can not see the scales on it clearly.

Moreover, the whole sundial is crystal clear, green condensed, delicate and warm, and the jade color is very good, even compared with the best jade in the jewelry store, it is not inferior.

Such a sundial made of a whole piece of green jade is worth a lot of money just because of the materials!