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Here is the news. The 2024 World Table Tennis Champions Tournament will take place from September 9 to 15 at the East Asian Games Dome in Macau, as announced by the event organisers.
The tournament will feature the men's and women's singles events with 32 male, and as many female players competing, and the finals are to be held on September 15th.
Lewis Gomez, acting president of the Sports Bureau of the Macau Special Administrative Region, expressed gratitude to the athletes for coming to Macau right after the Paris Olympics.
Offering thrilling games for both residents and visitors.
He also thanked World Table Tennis in his speech for swiftly organising the tournament following the Olympics.
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Chinese researchers have developed a new method of massive water production through the reaction between lunar regolith and hydrogen.
The study of the Moon's water content plays a vital role in the construction of future scientific research bases and human survival.
Research results from previous lunar polar explorations have revealed that ice may exist in a natural state at the moon's North and South poles, and in its permanently shadowed regions.
However, the natural water content in lunar minerals is extremely low, ranging from 0 .0001 % to 0 .02%.
That is according to the Ningbo Institute of Materials Technology and Engineering under the Chinese Academy of Sciences.
It remains challenging to extract and utilize water in situ on the moon.
Recently, a team of Chinese researchers have used lunar regolith samples brought back by the Chang 'e 5 mission to conduct related studies on various lunar minerals.
They found that the solar wind has irradiated the minerals in lunar soil for billions of years, which stored abundant hydrogen.
When heated to high temperatures, the hydrogen reacts with the iron oxides in the minerals to form elemental iron and large amounts of water, but when the temperature rises above 1000 degrees Celsius, the lunar soil melts and the water generated by this reaction is released as vapor.
The researchers confirmed that one gram of molten lunar regolith can generate 51 to 76 milligrams of water.
In other words, one tonne of lunar regolith can produce more than 50 kilograms of water, which can meet the daily drinking water needs of 50 people per day.
The in -situ heating experiments indicated that the hydrogen retained in lunar minerals is a substantial resource for producing water on the Moon.
The researchers studied the atomic structure of lunar Elmonite in detail.
They discovered that compared with ilmenite on Earth, the atomic spacing in lunar soil increased significantly due to the presence of hydrogen.
The simulation results showed that there are sub -nano tunnels in ilmenite in lunar soil which can absorb and store many hydrogen atoms from the solar wind.
These discoveries provide pioneering insights into the water exploration on the Moon.
The study results have been published in the journal, The Innovation, with joint efforts from various institutions, including the Institute of Physics, under the Chinese Academy of Sciences, China Academy of Space Technology, Songxiang Lake Materials Laboratory as well which returned to Earth in December 2020, retrieved 1731 grams of lunar samples, consisting primarily of rocks and soil from the lunar surface.
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A joint research team made up of Chinese and foreign physicists has observed a new antimatter hyper nucleus by using a heavy ion collider in the United States, marking an important step forward in the exploration of antimatter.
The discovery of anti -hyper -hydrogen four, which is the heaviest antimatter hyper - nucleus observed in experiments to date, was made by a research team led by the Institute of Modern Physics under the Chinese Academy of Sciences.
The study has been published in the academic journal Nature.
Current physics assumes that the properties of matter and antimatter are symmetrical and that equal amounts of matter and antimatter existed at the birth of the universe.
Fortunately, some mysterious physical mechanism led to a slight asymmetry in the early universe.
After the annihilation of most matter and antimatter, approximately one in 10 billion matter particles survived, which formed the matter world to this day?
What caused the difference in quantities of matter and antimatter in the universe?
To answer this question, Cho Hao, a researcher from the Institute of Modern Physics, noted that an important approach is to create new antimatter in the laboratory and study its properties.
In today's matter -dominated world, antimatter is extremely rare because it easily annihilates with surrounding matter.
Antimatter nuclei and antimatter hyper nuclei are even more difficult to produce.
Only six types of them have been discovered since scientists predicted the existence of antimatter in 1928.
The newly discovered anti -hyperhydrogen -4 was produced at the relativistic heavy -ion collider in the United States.
The equipment can accelerate heavy ion beams to almost the speed of light and make them collide.
These collisions simulate the conditions of the early universe in the laboratory, producing fireballs with temperatures of several trillion degrees, which contain approximately equal amounts of matter and antimatter.
As the fireball rapidly expands and cools, some antimatter escapes annihilation with matter and is detected by a detector named star.
According to Wu Junlin, a PhD student at the Institute after analyzing experimental data of approximately 6 .6 billion heavy ion collision events.
The scientists reconstructed anti -hyperhydrogen 4 from its decay products.
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The Yangtze sturgeon, an endangered species under First Class national protection, has been spotted in the upper stream of the Yangtze River in southwest China's Yunnan Province.
images of the rare fish were captured recently by photography enthusiasts along the river.
According to the local agricultural authority the video shows that the Yanksi sturgeon coexists in harmony with other fish highlighting the positive impact of a comprehensive fishing ban in the area.
The city has monitored 62 fish species since last year, including some rare ones demonstrating that the diversity of rare and endemic fish continues to increase in the region.
The Yancy sturchin, also known as the Dabris sturgeon, is one of the oldest vertebrates on earth.
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Beijing's Palace Museum Museum has taken a series of measures to increase the availability of tickets for individual visitors.
That is according to Su Yi, head of the museum's Digital and Information department.
The Palace Museum, one of the most popular tourist sites in the Chinese Capital, raised increased its daily ticket quota by 25 per cent, from 40 ,000, to relieve ticketing pressure in the peak summer season.
And the same measure will also be applied to other peak periods.
Suh revealed that tickets are now released in batches over longer time periods, starting from 8 p .m., rather than being released all at once.
Museums have enjoyed increasing popularity, particularly during holidays, as more and more people develop an interest in traditional Chinese culture.
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When you are visiting the central axis in Beijing, you may come across two high buildings at the northern end of the world cultural heritage site, the bell and drum towers.
On hearing the bell tower, you may easily think of Big Ben in London, or the bells of Notre Dame in Paris but how about the drum tower which looks like something unique in In China, actually, in Chinese culture, the bell tower and the drum tower are closely bound together.
You could hardly separate these two.
In ancient times, when modern communication methods were not yet invented, the fast beating sound of bells and drums served an alarm function.
But the alarm function was, of course, applied in wartime and on some special occasions.
In peacetime, the bell and drum towers usually play the role of time signals.
Such a time signal system was quite popular in ancient China.
In almost every historical city, you can find two such buildings, the bell tower and the drum tower, there like twin buildings standing next to each other.
Some are well kept to the present day and have become landmarks in local cities such as Beijing and Xi 'an.
Some even developed into a street name or a district name.
For example, the famous Gu Lo Da Jie, or Drum Tower Street in Beijing and Gu Lo District, the Drum Tower District in Nanjing, another famous ancient city in East China.
As a time -reporting institution in ancient times, the bell tower and the drum tower arose out of the needs of city management.
In the Han and Tang dynasties, cities began to impose a curfew at night and city dwellers were not allowed to go out at night.
The drumming sound, respectively in the morning and in the evening, served as a signal to open and close the city gates.
After the Northern Song Dynasty, that was over 1 ,000 years ago, with economic prosperity, the city gradually opened up and the curfew was cancelled.
But the custom of ringing the bell and beating the drum as a way of time -keeping was well established.
In order to send the sound of bells and drums further and make every corner of the city hear it, the Twin Towers were generally very tall, and usually the tallest buildings in the city.
As I mentioned, in history almost every city in China built its own bell and drum towers, many of them have been well kept to the present.
Among the existing bell and drum towers in China, the bell tower and the Drum Tower in Beijing are the best preserved and the largest in volume.
The Drum Tower of Beijing, or Gullou, is situated at the northern end of the central axis of the city, while the Bell Tower, or Zhonglou, stands closely behind it.
Both towers are now very famous tourist attractions in the capital city and have panoramic views over central Beijing.
Let's take a very brief look at how it functioned in the old days.
According to the regulations set in the following Ming and Qing dynasties, a day starts at morning bell, and ends at dusk drum.
The morning bell is Chen Zhong, and dusk drum is Mughu.
So Chen Zhong, Mughu, has even become a Chinese idiom, meaning words that can alert people to wake up.
Every evening from 7 p .m.
to 9 p .m. the bell and drum towers hit the drum 18 times and then hit the bell 18 times, for three rounds, for a total of 108 times.
After that the city gate is closed and night guards start patrolling the streets across the city, and from 3 a .m.
to 5 a .m. the next day, the drums and bells are struck once again to open the city gates and initiate a brand new day in the city.
Next time, if you've any chance to come to China and visit some ancient Chinese cities like Beijing, Xi 'an or Nanjing, don't forget to take a closer look at the landmarks in these ancient cities.
the bell tower and the drum tower.
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A joint research team made up of Chinese and foreign physicists has observed a new antimatter hyper nucleus by using a heavy ion collider in the United States, marking an important step forward in the exploration of antimatter.
The discovery of anti -hyper hydrogen 4, which is the heaviest antimatter hyper nucleus observed in experiments to date, was made by a research team led by the Institute of Modern Physics under the Chinese Academy of Sciences.
The study has been published in the academic journal Nature.
Current physics assumes that the properties of matter and antimatter are symmetrical and that equal amounts of matter and antimatter existed at the birth of the universe.
Fortunately, some mysterious physical mechanism led to a slight asymmetry in the early universe.
After the annihilation of most matter and antimatter, approximately one in ten billion matter particles survived, which formed the matter world to this day.
What caused the difference in quantities of matter and antimatter in the universe?
To answer this question, Cho Hao, a researcher from the Institute of Modern Physics, noted that an important approach is to create new antimatter in the laboratory and study its properties.
In today's matter -dominated world, antimatter is extremely rare because it easily annihilates with surrounding matter.
Antimatter nuclei and hypernuclei are even more difficult to produce.
Only six types of them have been discovered since scientists predicted the existence of antimatter in 1928.
The newly discovered anti -hyperhydrogen 4 was produced at the Relativistic Heavy Ion Collider in the United States.
The equipment can accelerate heavy ion beams to almost the speed of light and make them collide.
These collisions simulate the conditions of the early universe in the laboratory, producing fireballs with temperatures of several trillion degrees, which contain approximately equal amounts of matter and antimatter.
As the fireball rapidly expands and cools, some antimatter escapes annihilation with matter and is detected by a detector named STAR.
According to Wu Junlin, a PhD student at the Institute, after analysing experimental data of approximately 6 .6 billion heavy ion collision events, the scientists reconstructed Anti -Hyperhydrogen four from its Decay products.
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