In ancient China, there was nothing other than the four great inventions. Why do Chinese people always say they are advanced in science and technology?
Lai Jin Wei, reads a lot of books
You are wrong here. Ancient China has a history of more than 6000, 7000, or even 8000 years. Now the four inventions of China were gunpowder, printing, paper, and compasses. Below are a list of inventions the Chinese have created that are not the four great inventions.
In the Han dynasty (220 B.C-202 A.D), a Chinese inventor named Zhang Heng constructed a device called a seismoscope, a device which measures earthquakes. Though it only tells where the earthquake is coming from, it lay down the foundations of the modern seismoscope.
The firsts oil well is located in China, which dates back to 347 AD. The Chinese oil well reached depths of 240 meters and were made of bamboo and metal drills and bits. This invention, frequently attributed to the western world, lay down the foundations of modern oil wells and rigs.
8500 years ago, legend has it that a Chinese empress discovered silk when a silk larva’s cocoon fell into her cup of tea in a mulberry grove. When she tried to remove it, she found that it extracted a long shiny thread that was flexible and strong. She found more and wove it into robes and found they were lightweight, attractive, kept heat in winter, and is airy in summer. Since then, silk became China’s source of wealth. For thousands of years, Chinese silk is one of the most prized of all treasures, as no one knew how to make them but the Chinese.
译文来源：三泰虎 http://www.santaihu.com/46539.html 译者：Jessica.Wu
Between 3000 and 1900 BC, the Chinese found a way to melt metals and create weapons so powerful that they kill in one slash. The Chinese were one of the first civilizations to harness fire and melt metals. Many metal vessels from this period still remain today.
There are many more inventions, like machines for mass production powered only by water and a way to stop the rusting of metal, but the list is too long for one answer.
Andreas Mihardja, PhD from Georg-August University of Göttingen (1969)
That China only invented the big four is for me just misinformation in the western world. People in the west only know what they have invented in second half of the first millennium and the first half of the second millenniums as their comparison standard.
Just to compare in the field of food supply - agriculture and its industry.
Rice culture: The use of wet rice fields, the terrace system of constructing the rice fields, the transplanting of rice [biological weed control], the irrigation system, the fermentation of rice products into wine, pest control [biological pesticide], biological fertilizing [recycling human and animal waste], the use of plow and buffaloes and many more on which knowledge the Chinese calendar holidays are based. These knowledge were already in use 3000 BCE or older. Without this invention - the world don’t consume rice and rice products and the Asian continent will have nothing to eat.
The cultivation of soybean originated around the same period as rice and the production of soymilk, the doufu and soybean cooking oil was at least a millnnium before the CE era. The archeological evidence of soybean cultivation was found in the 11th century BCE and must be in cultivation long before. [Written in Shen Nung annals]
The production of millet in the northern part of China and the production of millet noodles was also found a millennium before CE. [The used of Wheat flour is not from China but from central Asia - the Hindukush region]
The evidence of the domestication of our chicken was found around 10 millenniums BCE This was found in the central plains around the Yellow river basin. The gen pool of Gallus gallus [=chicken]. Next to it, the domestication of pigs was around the 6th millennium BCE, and of course the water buffalo for the rice culture.
There is also evidence of drilling equipment for drilling 100’s of meter deep. they used the rotation movements by using cattle and the vertical drilling by jumping on the drill. They have been using this for their clean drinking water supply and also for petroleum [natural oil]
In the field of business or trade, China has the oldest banking system. Cheque for transporting wealth over long distance is done by paper money. [Coins and silver or gold bullion are dangerous to transport - remember Marco Polo wrote about it]. The abacus was the computer system since ages until even the second world war. This meant that the decimal counting systems was already in used more than 3 millenniums ago. Proof of the used could be observed in the Chinese counting boards, since the era of the yellow emperor. It is proven that the Persian decimal system came from the Chinese. The simplified writing of counting was however invented by the people from old Persia incl. modern mathematics [algebra]. Europe was starting to used the decimal around the time of the crusades. Before that era European people was still counting in dozens [bible - Sumerian era] and could not describe thousands or millions while Chinese already could used their 10 000 units counting system [萬].
We could find many more things that was invented in China and that we now accepted as granted and even believe it was a western invention. Just remember western civilization in Europe came after the crusades, when the serfs and slaves were becoming free people and the middle class started to develop. [people tend to forget history]