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How long does the subway line 4 take?

Does the subject want to ask "how long will it take for the whole journey of Beijing Metro Line 4"? 1 hour There are 28 stations in Beijing Metro Line 4, starting from Anheqiao Station and ending at Tiangongyuan Station, with a total length of 28.2 kilometers. According to the average speed and stopping time of Beijing subway trains, the whole journey needs 1 hour.