The municipal government of Beijing said on Wednesday that 20 subway lines or sections, spanning over 350 kilometers, will be under construction in 2017.
Construction of two new subway lines, the 6.5-kilometer CBD line and the 6.1-kilometer branch line of the Yanfang Line, China's first driverless line, will kick off this year.
Three subway lines, the Yanfang line, Xijiao line and S1 line, with a total length of 34.6 kilometers will open this year.
Currently Beijing has 19 lines covering 574 kilometers in operation.
Yang Guangwu, engineer with the Beijing large projects construction headquarters office, said the city will pay more attention to energy conservation and convenience in the new round of subway construction. For example, more escalators and facilities for the disabled will be built.