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The Double Ninth Festival in the historical development and evolution of a variety of folk customs as a whole, bearing a rich cultural connotation. In the folk concept, "nine" is the largest number in the number, which has the meaning of longevity and longevity, and it is the blessing of people for the health and longevity of the elderly. On May 20, 2006, the Double Ninth Festival was listed in the first batch of national intangible cultural heritage by The State Council. The Law of the People's Republic of China on the Protection of the Rights and Interests of the Elderly, amended by the Standing Committee of the National People's Congress in 2012, stipulates that the ninth day of the ninth lunar month is the day of the elderly.

The Double Ninth Festival, a traditional Chinese folk festival, falls on the ninth day of the ninth lunar month every year. The "nine" number is Yang number in the Book of Changes, and the "ninety-nine" two Yang numbers are equal, so it is called "Double Yang"; Because the sun and the moon are every nine, it is also called "double nine". Ninety-nine return, one yuan begins, the ancients believe that ninety-nine double ninth day is auspicious. In ancient times, there were customs of climbing high to pray for good luck, worshiping gods and ancestors, drinking and praying for longevity on the Double Ninth Festival. Since then, it has also added the connotation of respecting the elderly. Appreciation of autumn and gratitude and respect for the elderly are two important themes of today's Double Ninth festival activities. The Double Ninth Festival originated from the worship of celestial phenomena, which began in ancient times, popularized in the Western Han Dynasty, and reached its peak after the Tang Dynasty. According to the existing historical data and textual research, in ancient times, there were harvest activities to worship heaven and ancestors in the autumn; The ancients worshipped the Emperor of Heaven and ancestors at the time of harvest in September to thank the emperor of heaven and ancestors for their kindness, which is the original form of the Double Ninth Festival as the autumn harvest sacrifice activity. The Tang Dynasty was an important period when the traditional festival customs were mixed and formed, and its main part has been passed down to the present.

How to choose light steel keel ceiling? 1. For home decoration, it is important to note that the quality of decorative materials, especially toxic substances such as formaldehyde, is a huge hazard to people's health. Many green-developed light steel keel ceiling brand light steel keel ceiling products use environmentally friendly materials for the majority of Consumers create elegant, environmentally friendly and healthy products. In addition, energy saving is also an important part of environmental protection. Consumers must pay attention to purchasing environmentally friendly models of panels when they are ceilings.   2. Light steel keel ceilings choose brands to look at the details. As the saying goes: "Taste comes from details, and details make perfect." All major factors have been considered, and details cannot be ignored. Therefore, when consumers choose the light steel keel ceiling, the merchants who are often misled only pay attention to the promotion of the slab part and the supervision of the installation frame. This part of the supplementary material is equivalent to the basic construction and beams and columns, which are easy to corrode and deform, resulting in hanging to the sink. Even crash. Therefore, it can be as large as a board and as small as a keel ceiling piece. Therefore, here is to remind consumers that they must check carefully when buying and not sloppy. This is where the details of the decoration should be done. After reading the above introduction, you should know something about the light steel keel ceiling, which has a lot of profits, so it is loved by people during decoration. There are also many items to pay attention to when choosing, so as to ensure the quality of the product, there will be a better decoration effect, and more safety during decoration.

What are the benefits of light steel keel ceilings?   1. Light steel is a new type of building material. With the development of China's modernization, light steel keel ceilings are widely used in hotels, airport buildings, automobile traffic radio stations, radio stations, amusement parks, shopping centers, factories, buildings, and old buildings. , Building renovation, interior decoration settings, ceilings and other places. The light steel keel (paint) ceiling has the advantages of light weight, high strength, waterproof, shockproof, dustproof, sound insulation, sound absorption, constant temperature, etc., and the construction period is short, and the construction is simple.   2. Light steel keel suspended ceiling is a metal frame structure made of continuous hot-dip galvanized strip as raw material and rolled by cold bending process. Used for paper gypsum board, decorative gypsum board and other lightweight boards as decorative non-load-bearing walls and building roof decorations. It is suitable for the roofing and decoration of a variety of buildings, the basic materials for the inner and outer walls of the building and the ceiling of the scaffolding.    

STEEL FRAMING STUDS AND TRACK When choosing a supplier, quality materials are a top priority. That's why SCAFCO steel framing products are manufactured from 100% prime mill certified steel. SCAFCO's products exceed industry standards as they are manufactured from 57 ksi steel in place of 50 ksi and G90 in place of G60 for 68 mil and heavier. Applications Non-load-bearing exterior curtain walls Axial load-bearing interior and exterior walls Interior non-load-bearing walls Floor joists and headers Rafters, purlins, and girts AISI and ASTM Code Standards AISI's North American Specification for the Design of Cold-Formed Steel Structural Members A653-- Standard specification for steel sheet, zinc-coated (galvanized) by the hot-dip process A1003-- Standard specification for steel sheet, carbon, and metallic-coated for cold-formed framing members C645-- Standard specification for nonstructural steel framing members C754-- Standard specification for installation of steel framing members to receive screw-attached gypsum panel products C955-- Standard specification for load-bearing (transverse and axial) steel studs, runners (tracks), and bracing or bridging for screw application of gypsum panel products and metal plaster bases E72-- Standard test methods of conducting strength tests of panels for building construction E90-- Standard test method for laboratory measurement of airborne sound transmission loss of building partitions and elements E119-- Standard test methods for fire tests of building construction and materials Steel frame stud and track table Series Name Part Name Specification(mm) A*B Thickness Ceiling Main Keel 38 Main Runner 38*12 0.6/0.8/1.0/1.2 50 Main Runner 50*15 1.0/1.2 60 Main Runner 60*27 1.0/1.2 Furring Channel 50 Cross Runner 50*19 0.34/0.5/0.6 60 Cross Runner 60*27 0.5 Partition Transverse Keel (U Track) 50 Metal Track 50*35 0.46/0.65 75 Metal Track 75*40 0.46/0.57 100 Metal Track 100*40 0.5/0.7/0.8 150 Metal Track 150*40 0.6/0.8 Vertical Keel (C Type) 50 Vertical Keel 50*50 0.46/0.53/0.65 75 Vertical Keel 75*50 0.5/0.6/0.8 100 Vertical Keel 100*50 0.5/0.6/0.8 150 Vertical Keel 150*50 0.7/0.8/1.0

At 21:22 Beijing time on May 10, 2023, the launch of the Long March 7 Yaoqi carrier rocket carrying the Tianzhou 6 cargo spacecraft was a complete success. It is reported that Tianzhou-6 cargo spacecraft loaded Shenzhou-16 and Shenzhou-17 six astronauts in orbit to stay consumables, propellants, application test equipment and other materials. On May 22, the Shenzhou 16 manned spacecraft and the Long March 2F-16 carrier rocket were transferred to the launch area. The launch site facilities and equipment are in good condition, and the subsequent functional inspections and joint tests before the launch will be carried out, and the launch is planned to be carried out at an appropriate time. On May 26, Shenzhou 16 manned mission launched the launch site system joint training. The content of the whole system launch drill is basically the same as the formal launch procedure, the spacecraft to check the system function, Shenzhou 16 astronauts into the spacecraft return module, began the joint inspection and test of man, ship, arrow and ground. On May 28, Shenzhou 16 manned spacecraft launch mission organized joint training in the whole region. The launch system has completed the relevant functional checks, and done all the preparatory work before the launch.

In April 2022, it was reported that the new batch of Shenzhou 16 spacecraft has made some technical improvements, and the development and delivery work is steadily advancing. In June, according to the China Manned Space Engineering Office, the Shenzhou team carried out the return mission, the rendezvous and docking of two ships, and the emergency rescue standby mission of three ships as planned, involving a total of four Shenzhou spacecraft from Shenzhou 13 to Shenzhou 16. On October 6, according to CCTV military news, it was learned from the Jiuquan Satellite Launch Center that Shenzhou 16 was basically ready for work and had the conditions to meet the spacecraft and rocket approach. In December, according to CCTV military news, Shenzhou 16 spacecraft has completed the final assembly test work at the launch site and entered the emergency rescue standby state. On February 15, 2023, the China Manned Space Engineering Office officially launched the annual manned flight mission identification collection activity, and publicly solicited the mission identification of two manned flight missions and one cargo spacecraft flight mission in 2023. On February 16, it was reported that it planned to launch the Shenzhou 16 manned spacecraft in May. On March 21, Shenzhou 16 manned mission logo was released. In April, the State Intellectual Property Office issued an announcement on the approval of the registration of three special marks including the "Shenzhou 16 manned flight mission".

Shenzhou XVI (abbreviated as: Shenzhou XVI) is the 16th spacecraft launched by China's manned space program. On May 18, 2023, according to the basic information of 2023 manned space missions announced on the official website of China Manned Space, Shenzhou 16 manned spacecraft will be launched in May. Beijing time on May 22, Shenzhou 16 ship arrow assembly transferred to the launch area. At 9:31 on May 30, 2023, the Long March 2F Yao 16 carrier rocket carrying the Shenzhou 16 manned spacecraft was launched from Jiuquan Satellite Launch Center. The astronauts and crew were in good condition and the launch was a complete success. The crew of Shenzhou 16 consists of three astronauts: Jing Haipeng, Zhu Yangzhu and GUI Haichao. At 21:40 on July 20, 2023, after about 8 hours of extravehicular activities, Shenzhou 16 astronauts Jing Haipeng, Zhu Yangzhu and GUI Haichao worked closely together and successfully completed all the assigned tasks of extravehicular activities with the support of the robotic arm of the space station. At 15:45 PM on September 21, 2023, the fourth lesson of the "Tiangong Class" will start, and Shenzhou 16 astronauts Jing Haipeng, Zhu Yangzhu and GUI Haichao will give space science popularization lessons to young people across the country.

The plane of Notre Dame de Paris is a long horseshoe Gothic Latin cross shape, a total length of about 127 meters, a total width of about 48 meters, a total height of 96 meters, a total construction area of 5500 square meters, a total area of 6,000 square meters; The west facade has two clock towers, about 69 meters high; Inside there are five longitudinal cabins, including a middle cabin and two wings on each side, the top of the cross is the altar, the long wing of the cross is the main basilica of Notre Dame; At the east end is the altar, followed by a semicircular outer wall, the two ends of the hall are open, beside the small tower; Outside the altar is the iconic minaret, 96 meters high. Notre Dame de Paris is the first Gothic church in the world in a full sense, the sculpture art and painting art of the building body and a large number of art treasures in the hall have high historical and cultural value and the world reputation, is the symbol of Paris, France, the world's mainstream religion Christian holy land.

Notre Dame de Paris (French: Cathedrale Notre Dame de Paris), also known as Notre Dame Cathedral of Paris, Notre Dame de Paris Cathedral, is located in the central city of Paris, the capital of the French Republic, located on the central island of the Seine, across the river from Paris City Hall and the Louvre, for the Gothic Christian church building; Founded on March 24, 1163 (four years of Pope Alexander III), it is the Cathedral of the Catholic Archdiocese of Paris, one of the oldest and most symbolic monuments in the French capital, one of the most famous Gothic cathedrals in Europe, one of the most representative cultural relics and world heritage sites in France, and a landmark of French and European literature and culture.