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Telecommunications in China

Telecommunications in China is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Telecommunications in China rather than just read about it. In short: The People's Republic of China possesses a diversified communications system that links all parts of the country by Internet, telephone, telegraph, radio, and television. The country is served by an extensive system of automatic telephone exchanges connected by modern networks of fiber-optic cable, coaxial cable, microwave radio relay, and a domestic satellite system; cellular telephone service is widely available…

Telecommunications in China — main illustration
Telecommunications in China — illustration

Key takeaways

  • Telecommunications in China belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Telecommunications in China to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Telecommunications in China from memory before moving on to harder problems.

Reference excerpt

The People's Republic of China possesses a diversified communications system that links all parts of the country by Internet, telephone, telegraph, radio, and television. The country is served by an extensive system of automatic telephone exchanges connected by modern networks of fiber-optic cable, coaxial cable, microwave radio relay, and a domestic satellite system; cellular telephone service is widely available, expanding rapidly, and includes roaming service to foreign countries. Fiber to the x infrastructure has been expanded rapidly in recent years.

History

Telegraphy was introduced to China in 1871 when a newly laid cable between Shanghai and Hong Kong connected Qing-era China to the British-dominated international telegraph network. When the People's Republic was founded in 1949, the telecommunications systems and facilities in China first established by the Qing and Republican ITA and Ministry of Posts and Communications had been seriously damaged from over thirty years of on and off war between warlords, Japan, and the two sides of the Chinese Civil War. What little remained was largely outdated and rudimentary and limited to the eastern coastal cities, the Nanjing-Shanghai region, and a few interior cities. In the 1950s existing facilities were repaired, and, with Soviet assistance, considerable progress was made toward establishing a long-distance telephone wire network connecting Beijing to provincial-level capitals. Communications in China were established rapidly in the early 1950s. By 1952 the principal telecommunications network centered on Beijing, and links to all large cities had finally been established. Work quickly got under way to repair, renovate and expand the system, and from 1956 telecommunications routes were extended more rapidly. To increase the efficiency of the communications system, the same lines were used for both telegraphic and telephone service, while Teletype and television (broadcasting) services were also added. In addition, conference telephone service was initiated, radio communications were improved, and the production of telecommunications equipment was accelerated. Growth in telecommunications halted with the general economic collapse after the Great Leap Forward (1958–1960) but revived in the 1960s after the telephone network was expanded and improved equipment was introduced, including imports of Western plants and equipment. In the years immediately following 1949, telecommunications – by telegraph or telephone – mainly used wire; by the 1970s, however, radio telecommunications equipment were increasingly used and began to replace wire lines. Microwave and satellite transmissions were soon introduced and have now become common. (China launched its first television-broadcast satellite in 1986.) In 1956 the first automatic speed Teletype was installed on the Beijing-Lhasa line. By 1964 such machines had been installed in most of China's major cities. Radio-television service also was installed in major cities, and radio teleprinters became widely used. Telecommunications networks expanded significantly as a result of the Third Front campaign to develop basic industry in national defense industry in China's rugged interior in case of invasion by the Soviet Union or the United States. Production of radios within the Third Front regions rose by 11,668%. An important component of the Fourth Five-Year Plan (1971–1975) was a major development program for the telecommunications system. The program allotted top priority to scarce electronics and construction resources and dramatically improved all aspects of China's telecommunications capabilities. Microwave radio relay lines and buried cable lines were constructed to create a network of wideband carrier trunk lines, which covered the entire country. China was linked to the international telecommunications network by the installation of communications satellite ground stations and the construction of coaxial cables linking Guangdong Province with Hong Kong and Macau. Provincial-level units and municipalities rapidly expanded local telephone and wire broadcasting networks. Expansion and modernization of the telecommunications system continued throughout the late-1970s and early 1980s, giving particular emphasis to the production of radio and television sets and expanded broadcasting capabilities. By 1987, China possessed a diversified telecommunications system that linked all parts of the country by telephone, telegraph, radio, and television. None of the telecommunications forms were as prevalent or as advanced as those in modern Western countries, but the system included some of the most sophisticated technology in the world and constituted a foundation for further development of a modern network. Overall, China's telecommunications services improved enormously during the 1980s, and, the pace of telecommunications growth and technology upgrading increased even more rapidly after 1990, especially as fiber-optic systems and digital technology were installed. After 1997, China's telecommunications services were enhanced further with the acquisition of Hong Kong's highly advanced systems. In the late 1990s and early 2000s, foreign investment in the country's telecommunications sector further encouraged growth. Notable has been the tremendous increase in Internet and cellular phone usage. China became the world leader in the early 21st century, in terms of number of cell phone subscribers. The nation ranks first in the world in numbers of both mobile and fixed-line telephones, and first in the number of internet users. China is the largest user of largest Voice calling over the Internet or Voice over Internet Protocol (VoIP) services with 51 million Tom-Skype users as of November 2007.

History of telecommunications services

… excerpt ends here. Continue reading the full article.

Illustrations

Telecommunications in China: Phone booth, Luohu District, Shenzhen
Phone booth, Luohu District, Shenzhen
Telecommunications in China: Telephone area codes
Telephone area codes

Worked examples

Example 1 — a first encounter with Telecommunications in China

Start with the simplest possible case. Write down what Telecommunications in China claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Telecommunications in China before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Telecommunications in China ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Telecommunications in China

In research
Telecommunications in China appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Telecommunications in China in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Telecommunications in China is common in secondary-school and first-year university syllabi. It links to neighbouring topics Telecommunications in China, so understanding it makes those chapters shorter.
In everyday life
Look for Telecommunications in China outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Telecommunications in China in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Telecommunications in China means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Telecommunications in China out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Telecommunications in China in simple terms?

The People's Republic of China possesses a diversified communications system that links all parts of the country by Internet, telephone, telegraph, radio, and television. The country is served by an extensive system of automatic telephone exchanges connected by modern networks of fiber-optic cable…

Why does Telecommunications in China matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Telecommunications in China?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Telecommunications in China.

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