What is capable?

Tonight is the Mid Autumn Festival.

"People are looking at the moon tonight" is a seven character quatrain named "Looking at the Moon at Fifteen Nights and Sending it to Doctor Du" written by poet Wang Jian of the Tang Dynasty. This poem was written by the poet when he met his friends on the Mid Autumn Festival and was sent to his friend Du Langzhong. So tonight, people in Yueming try to describe the Mid Autumn Festival.

Original poem:

"Watching the Moon on the Fifteen Nights and Sending it to Doctor Du"

White tree dwelling crows in the atrium, cold dew silent wet osmanthus.

Tonight, people are looking at the moon, I wonder who will fall in love with autumn?

Word and sentence annotation

(1) Send it to Du Langzhong: the first one is "Watching the Moon in Fifteen Nights". The self note under the titles of Wang Jian's Poems Collection and Ten Thousand Tang Dynasty Jue Poems in the Song Dynasty: "When people can play zither," the fifteen nights refer to the night on the 15th day of the eighth month of the lunar calendar, that is, the night of the Mid Autumn Festival. Du Langzhong, whose name is unknown. In a word, Du Lang refers to Du Yuanying, the fifth grandson of Du Ruhui, who served as the secretary general and minister of the Ministry of Household in the time of Emperor Muzong of the Tang Dynasty. In addition, according to Yin Zhanhua's research, Doctor Du is suspected to be Du Lan. The New Book of the Tang Dynasty · Biography of Du Lan: "In the early years of Zhenyuan and the first year of Jinshi... soon, he was granted the title of Hubu Doctor." Doctor, official name, is the general name of imperial attendants.

(2) Atrium: in the courtyard. Floor white: It means the moon is bright and the ground is white. Tree dwelling crows: crows live in trees.

⑶ Cold dew: cool dew. Osmanthus fragrans: Osmanthus fragrans bloom in August. It is said that there are osmanthus trees in the middle of the month. There are two meanings here.

⑷ Do: all.

(5) Autumn thoughts: the feelings of autumn, here refers to the thoughts of people. It is also the name of zither music. Cai Yong's "Qingxi Wunong" includes five songs, including "Spring outing", "Lushui", "Solitary residence", "Sitting melancholy", and "Thinking in autumn". Fall: at, to. One is "in".

Poetry analysis:

The first two sentences select three typical features, namely, bright moonlight, calm crows and dewy osmanthus flowers, to describe the unique night scene of the Mid Autumn Festival. The last two sentences do not express feelings from the front, but use a euphemistic tone of questioning to express their feelings of missing friends on the moon more deeply. The whole poem starts from the scenery and ends with lyric knot, with beautiful artistic conception, rich imagination, vivid language, sincere feelings, euphemism and moving.

Dust explosion belongs to chemical explosion.

Dust explosion refers to the chemical reaction in which combustible dust is mixed with air to form a dust cloud in a confined space. Under the action of ignition source, the formed dust air mixture burns rapidly and causes a sudden rise in temperature and pressure.

There are generally five dust explosion conditions:

1. The dust itself is flammable or explosive.

2. Dust must be suspended in the air and mixed with air or oxygen to reach the explosion limit.

3. There is enough thermal energy to cause dust explosion, namely ignition source.

4. Dust has certain diffusivity.

5. Dust will explode in the sealed space, such as ethanol and water dust explosion in pelletizing oven and boiling dryer.

The difficulty of dust explosion is related to the physical and chemical properties of dust and environmental conditions. It is generally believed that the greater the combustion heat, the easier the explosion will be, such as coal dust, carbon, sulfur, etc. Materials with fast oxidation speed are easy to explode, such as magnesium powder, aluminum powder, ferrous oxide, dyes, etc. Dust easy to be charged is also easy to cause explosion, such as synthetic resin powder, fiber dust, starch, etc. These materials with poor conductivity accumulate static electricity due to friction with machines or air. When they reach a certain amount, they will discharge and produce electric sparks, which will constitute an explosive ignition source.

The dust explosion can be seen as the following three steps:

The first step is that suspended dust can be quickly retorted or gasified under the action of heat source to produce combustible gas.

The second step is combustion of combustible gas mixed with air.

The third step is to transfer the heat from the dust combustion to the nearby suspended or blown dust in the form of heat conduction and flame radiation, and these dust will be heated and vaporized to make the combustion go on circularly.

As each cycle goes on step by step, its reaction speed gradually accelerates, and finally forms explosion through intense combustion. This explosion reaction, as well as the speed of explosion flame, the speed of explosion wave, and the explosion pressure, will continue to accelerate and increase, and will develop in a leaping manner.

Yanmen Pass is located in Yanmen Mountain, 20 kilometers north of Daixian County, Xinzhou City, Shanxi Province, China.

Yanmen Pass, an important pass on the Great Wall, is famous for its "danger", known as "the first pass in China", and has the saying that "there are nine blockades in the world, and Yanmen is the leader". Together with Ningwu Pass and Pianguan Pass, it is called "Outer Three Passes".

Construction history:

King Wuling of Zhao once carried out military reform, dressed in Hu, rode and shot, defeated the invasion of Lin Hu and Lou Fan, and established Yunzhong, Yanmen and Daijun. Later, Li Mu was ordered to stay in Yanmen to guard against the Huns. In order to prevent the Huns from harassing the border people of Zhao, the Huns had no income for several years, while the Zhao army was strong and willing to fight for the first war. "Destroy more than 100000 Xiongnu cavalry." For more than ten years, Xiongnu dared not invade Zhao. Later generations called Li Mu a "genius" and built a "Jingbian Temple" at Yanmen Pass to commemorate his military achievements in defending the border and protecting the people. After unifying the six countries, the First Emperor of Qin sent Meng Tian, a senior general, to lead 300000 troops to the Yanmen Pass, "strike Hu in the north, and get to Henan" (that is, Hetao area), drove the Huns to the north of Yinshan, and built the Great Wall.

During the reign of Liu Bang, the Emperor Gaozu of the Han Dynasty, the Huns surrounded Han Wangxin, and Han Wangxin surrendered. The Huns led Nanyue Gouzhu to drive Jinyang (Taiyuan).

After Emperor Wu of the Han Dynasty succeeded to the throne, he began to fight back against the Xiongnu's rampant southern invaders. In the fifth year of Yuanguang (130 BC), Emperor Wu of the Han Dynasty issued an edict to repair Yanmen Pass.

The Yuan Dynasty set up thousands of houses, and the pass city was destroyed.

In the seventh year of Hongwu's reign (1374), Hou Luxiang of Ji'an in the Ming Dynasty supervised migrant workers to build a new thoroughfare ten miles northeast of the old pass. It is more than 40 miles away from Daicheng County in the south and 21 miles away from Guangwu Ancient City in the north. The terrain is even more dangerous.

After the Ming and Qing dynasties, Guancheng was rebuilt repeatedly. However, with the gradual formation of the unified national territory of the Chinese nation, the role of the Inner Great Wall as the "inner side" has been lost, and the Yanmen Pass, which belongs to it, has also been abandoned. Guancheng is only located in the three gateways of the East Gate, the West Gate and the Small North Gate, and a pair of stone lions, a pair of flagpoles, a stone tablet engraved with Li Mu, and several green pines behind the Jingbian Temple.

On October 18, 1937, after Yan Xishan abandoned the pass and retreated to the south, the 716 Regiment of the Twentieth Division of the Eighth Route Army marched into the vicinity of the Datong Highway at Yanmen Pass, ambushed the Japanese motor transport team here, destroyed more than 400 enemy vehicles at one fell swoop, and won a great victory that shocked the world.

On June 25, 2001, as an ancient building of the Ming Dynasty, Yanmen Pass was approved by the State Council to be included in the fifth batch of national key cultural relics protection units.

In 2022, Shanxi will introduce the work plan for the construction of leading scenic spots, implement the "9+13" cascade construction plan, and cultivate 13 key scenic spots, including Yanmenguan Guangwu.

Building layout:

To the east of Yanmen Pass, take Pingxing Pass, Zijing Pass and Daoma Pass to Youyan and connect with Hanhai; Go west to Xuangangkou, Ningwu Pass and Piantou Pass to the Yellow River. Hengshan Mountain, along the Inner Great Wall winding at the top of the mountain along the northern border of Daixian County, integrates Yanmen Mountain, Mantou Mountain and Caodao Mountain. It is adjacent to Yanbei Plateau in the north and Xinding Basin in the south. Yanmen Pass is located on the Gouzhu Ridge in the north of Daizhou Ancient City, on the Yanmen Mountain about 20 kilometers north of Daixian County in the north of Shanxi Province. The "Jiu Sai Chong Yi Guan" grand pass is close to the mountain and close to the danger, perched high on Gouzhu Mountain, and is one of the main central channels for wild geese to return from the south to the north.

The besieged city of Yanmen Pass was built along with the mountains, with a perimeter of more than 5 kilometers. The south end of the city wall is respectively connected with the east and west wings of the pass city, and extends northward along the ridge to the valley bottom enclosure, where a city gate is built. In addition to the besieged city, there are 3 large stone walls and 25 small stone walls, which act as barriers.

There is the former barracks of the Ming and Qing garrison on the hillock just north of the pass city, and there is a military training school in the southeast. The temple outside the west gate is related to the emperor. Outside the east gate is the Jingbian Temple, which is dedicated to Li Mu, the famous general of the Warring States Period. Now there are only stone platforms, stone lions, stone flagpoles and the Ming and Qing Dynasty steles of Datong.

The old Guancheng to the west of Guancheng is commonly called Tielimen. The two passes are connected by the Great Wall made of stone, and enemy towers and beacon towers are built to form a complete defense system. Near Jiuguancheng, there is a section of the Baicaokou Great Wall built in the Ming Dynasty, which is one of the best preserved sections of the Great Wall in China. This section of the Great Wall is 5033m long, 6-8m high, 5m wide at the bottom and 3m wide at the top. Every 120 meters or so, a beacon tower and an enemy tower will be built, and fortresses, trenches and secret doors will also be set up in dangerous sections. After its east and west ends extend northward, it finally connects with the Outer Great Wall.

Wanchai Wharf belongs to the American General Mills Food Company.

"Wanchai Wharf" is a fast frozen food brand. Its founder, Ms. Zang Jianhe, started out selling dumplings at a stall beside the Hong Kong Wanchai Wharf. After cooperating with the American General Mills in 1997, Wanchai Wharf dumplings have subsequently established production bases in Shanghai and Guangzhou, and launched the hand made "Wanchai Wharf" dumplings, wontons and dumplings.

Origin of Wanchai Wharf:

In the late autumn of 1977, Miss Zang quit her job as a nurse in Qingdao and took her two daughters to Thailand. There is a husband and his big family who went three years earlier than her. However, since she did not have a boy, the husband married another wife. Miss Zang and her two daughters left their families and came to Hong Kong. For her daughter and life, Miss Zang sold her "Beijing dumplings". But "Beijing Dumpling" is just a generic term. So she added four words on the trolley "Beijing Dumplings": Wanchai Wharf.

Because her dumplings taste delicious, the price is not expensive, and the service is also very good. Over time, there have been many frequent customers, who have brought many new customers. In just a few years, the dumplings of Zang Girls at Wanchai Wharf have become famous far and near.

In 1997, cooperating with American General Mills, Wanchai Wharf family dumplings occupied 10% of the fresh dumplings market and 30% of the frozen dumplings market in Hong Kong. Now Wanchai Wharf dumplings have reached more than 20% of the market share in Beijing.

On May 1, 2016, the "Wanchai Dock" brand officially announced in Beijing that it would sponsor the Chinese national diving team to participate in the 2016 Rio Olympic Games.

Yunnan belongs to the southwest of China.

Yunnan is located in the southwest border of China. The Tropic of Cancer runs through the southern part of the province and is a low latitude inland area. It is adjacent to Guizhou Province and Guangxi Zhuang Autonomous Region in the east, Sichuan Province in the north, Tibet Autonomous Region in the northwest, Myanmar in the west, Laos and Vietnam in the south.

Yunnan belongs to mountainous plateau terrain, which is divided into east and west terrain areas by Yuanjiang Valley and the wide valley in the south of Yunling Mountains. The eastern part is the eastern and central Yunnan plateaus, which is a part of the Yunnan Guizhou plateau. The average altitude is about 2000 meters. It is characterized by gently undulating low mountains and rounded hills, and various types of karst (karst) landforms are developed; In the west, mountains and canyons alternate, and the terrain is steep. The relative height difference between mountains and canyons exceeds 1000 meters. The terrain of Yunnan Province is high in the northwest and low in the southeast, and it drops step by step from north to south. Every kilometer of horizontal straight distance from north to south, the average altitude drops by 6 meters.

The climate of Yunnan basically belongs to the subtropical plateau monsoon type, with obvious three-dimensional climate characteristics. There are many types, small annual temperature difference, large daily temperature difference, distinct dry and wet seasons, and obvious vertical temperature changes with terrain height. The distribution of precipitation in the whole province is extremely uneven in season and region. The dry and wet seasons are distinct. The wet season (rainy season) is from May to October, with 85% rainfall concentrated; The dry season (dry season) is from November to April of the next year, and the precipitation only accounts for 15% of the whole year. The regional distribution of precipitation in the province varies greatly. The annual precipitation in the most places can reach 2200-2700 mm, the minimum is 584 mm, and the annual precipitation in most areas is more than 1000 mm.