The world's longest high-speed rail link, connecting Beijing and Guangzhou, the capital of Guangdong province, became fully operational on Wednesday.
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The 2,298-km line cuts the journey time from more than 20 hours to around eight and connects 28 cities, including five provincial capitals.
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The designated speed of the route is 350 km/h, although the initial operating speed is around 300 km/h.
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Fifteen minutes after the bullet train departed from Beijing West Railway Station, the speedometer hit 300 km/h and the speed was maintained for almost the entire journey, the exception being the section between Xuchang in Henan province and Hengdian in Hubei province, because of heavy snow.
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The CRH380A(L) train, which is in service on the new line, has undergone extensive tests around the country, so its reliability is assured, said Wu Donghua, a senior engineer at CSR Sifang Co, one of China's biggest manufacturers of bullet trains.
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The train's internal temperature was maintained at a comfortable level, with a low of 18 C.
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The train is equipped with special washrooms for the disabled and can serve four different types of cuisine.