"4" . . . "2021" . . "Line 11 (Beijing Subway)" . "Line 11" . . . . . "11" . "Line_11_(Beijing_Subway)" . "Line 11 (Beijing Subway)" . "3" . "100.0" . "Operational" . "4200.0" . . . "1540.0" . "2021-12-31" .