Science and technology of the Tang dynasty facts for kids
The Tang dynasty (618–907) was a golden age in ancient China. During this time, people made many amazing discoveries in science and technology. They improved things like woodblock printing, how they told time, mechanical machines, medicine, and how they built structures.
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Printing Books and Playing Games
The invention of woodblock printing during the Tang dynasty changed everything. Suddenly, many more people could read! Books became much cheaper and easier to find. This meant more people learned to read and write. Over time, this helped more ordinary people get important jobs in the government.
One of the oldest printed books ever found is the Diamond Sutra. It was printed in 868 AD and has cool pictures inside the text. Early printed items included Buddhist texts and calendars. Calendars were super important for knowing which days were lucky!
Even before modern printing came to China, books were incredibly cheap. People could buy a lot of printed material for very little money. This shows how popular and successful woodblock printing was.
While Bi Sheng later invented movable type in the 11th century, woodblock printing stayed the main way to print in China for a long time. It was used until new printing machines from Europe arrived much later.
How Playing Cards Began
Did you know playing cards might have started in the Tang dynasty? They probably came about because of woodblock printing. The first mention of card games is from a text around the 9th century. It talks about a princess playing a "leaf game" in 868 AD.
Early "leaf" games might have used pages from books. Later, people played social games with cards that had instructions or challenges printed on them. These weren't like modern cards with suits and numbers.
The first time we hear about cards with suits and numbers was in 1294. Two people were arrested for playing with "zi pai" cards. Authorities even found the wood blocks used to print them!
Some historians think the first cards were actually paper money used for games. But using real money was risky. So, people started using "money cards" instead. One old game called Madiao used 38 "money cards" with four different suits. These cards even had characters from a famous story called Water Margin on them!
Clever Clocks and Time Machines
The Tang dynasty built on older inventions. A smart monk, engineer, and astronomer named Yi Xing (683–727) invented the world's first clockwork escapement mechanism in 725 AD. This was a super important part of mechanical clocks.
Yi Xing used this invention with a water clock and a waterwheel. It powered a spinning armillary sphere that showed how stars moved. His device also had a bell that rang every hour and a drum that beat every quarter-hour. It was like an early striking clock!
Yi Xing's amazing astronomical clock became famous. Students even had to write essays about it for their important government exams. The most common public clocks were water clocks. Engineers improved their design around 610 AD to make them more accurate for different times of the year.
Fun Mechanical Inventions
The Tang era had many other cool mechanical inventions. Imagine a 3-foot-tall mechanical wine server! It looked like a mountain made of iron and sat on a wooden turtle. This clever machine used a pump to pour wine from dragon-headed faucets. It even had tilting bowls that filled with wine and then tipped it into an artificial lake. Iron leaves would pop up in the lake to hold party snacks!
Historian Charles Benn described how a dragon on the mountain would open its mouth and pour drinks into a cup. When the cup was mostly full, the dragon stopped. If a guest was slow to drink and return the cup, a door opened at the top of the mountain. A mechanical server, dressed in a cap and gown, came out with a wooden bat! As soon as the cup was returned, the dragon refilled it, and the server went back inside. A hidden pump kept the drinks flowing.
Mechanical puppets were not new to China. They existed since the Qin dynasty (221–207 BC). Another engineer, Ma Jun, had a whole puppet theater run by a waterwheel in the 3rd century.
There were other amazing automatons. General Yang Wulian had a wooden monk statue that held out its hands for donations. When enough coins were collected, the monk's arms moved to put them in a bag. This was like an early coin-operated machine! Another inventor, Wang Ju, had a "wooden otter" that could supposedly catch fish. It might have used a clever spring trap.
Advancements in Medicine
People in the Tang dynasty were very interested in medicines. In 657 AD, Emperor Gaozong of Tang ordered a huge project. They created an official book of medicines, called a materia medica. It had text and pictures for 833 different substances! These came from stones, minerals, plants, animals, and even foods.
The Tang government also supported medical schools and exams for doctors. They even published guides for doctors to use. Important doctors like Zhen Qian (died 643 AD) and Sun Simiao (581–682 AD) made big discoveries. Zhen Qian was the first to write that patients with diabetes had too much sugar in their urine. Sun Simiao was the first to say that diabetic patients should avoid certain foods.
Doctors in the Tang dynasty successfully used thyroid glands from sheep and pigs to treat goiters. This was a very early treatment! Western doctors didn't use thyroid extracts for goiters until 1890.
Building Wonders and Maps
The Tang dynasty had official rules for building. These were written in a book called the Yingshan Ling (National Building Law). Later, a detailed guide called the Yingzao Fashi from 1103 AD became the oldest complete book on Chinese architecture.
During the reign of Emperor Xuanzong of Tang (712–756 AD), there were over 34,000 registered craftsmen working for the government. They built amazing structures!
Mapping the World
Map-making also saw great progress in the Tang dynasty. Cartographers like Pei Ju (547–627 AD) created detailed maps with grids and scales. This helped make maps more accurate.
Another cartographer, Jia Dan (730–805 AD), made a huge map of China and its former colonies. It was completed in 801 AD and was about 30 feet long and 33 feet high! It used a grid where one inch equaled one hundred li (a Chinese unit of distance).
While many terrain maps from the Tang period haven't survived, we still have amazing star charts. The Dunhuang map, from around 700 AD, shows over 1,300 stars!
Chemistry, Gas, and Cool Air
The Tang Chinese used complex chemical recipes for many things. They found these through experiments, often related to alchemy. They created waterproof and dust-repelling creams for clothes and weapons. They also made fireproof cement for glass and porcelain. There was even a special cream for divers' silk clothes to keep them dry!
The beautiful, see-through ceramic called porcelain was invented in China during the Tang dynasty. Many other types of glazed ceramics came before it.
Early Gas Cylinders
For a long time, the Chinese had drilled deep holes to get natural gas. They used bamboo pipelines to carry the gas to stoves. There, they boiled salty water to get salt.
During the Tang dynasty, people in Sichuan province found a way to collect natural gas. They put it into portable bamboo tubes! These tubes could be carried for many miles and still produce a flame. These were like the first gas cylinders, probably with some kind of tap to control the gas.
Keeping Cool with Air Conditioning
The idea of air conditioning goes way back! An inventor named Ding Huan in the Han dynasty (around 180 AD) created a rotary fan. It had seven wheels, each 10 feet wide, and was powered by hand.
In 747 AD, Emperor Xuanzong of Tang had a "Cool Hall" built in his palace. It had water-powered fan wheels for air conditioning. It also had water shooting up from fountains to keep things cool. Later, in the Song dynasty, these rotary fans became even more common.
