If you take the subway in Beijing，you may see there's nobody in the driver's seat．But don't be afraid—it just means you are on the new driverless line．{#blank#}1{#/blank#}September 2017，a driverless subway line{#blank#}2{#/blank#}(name)the Yanfang Line started to try running in Beijing．The line was open to passengers at {#blank#}3{#/blank#}end of 2017．The trains on the new line are the Chinese{#blank#}4{#/blank#}(one)domestically(国内地)made driverless subway cars．The line {#blank#}5{#/blank#}(build)between Beijing's Yanshan and Fangshan areas with 960 seats and a top speed of 80 {#blank#}6{#/blank#}(kilometer)per hour. The trains are{#blank#}7{#/blank#}(complete)self-driven．The general designer says the driverless trains actually run in a{#blank#}8{#/blank#}(safe)way than regular subway trains．And of course，the "drivers" of the new trains can't become ill{#blank#}9{#/blank#}tired．So far, twelve cities in China{#blank#}10{#/blank#}(begin)to build such driverless subway lines．