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１９９９年１２月１１日上午，北京市城市快速轨道交通铁路线在北郊的上地开工兴建。这条城市快速轨道交通铁路线是北京城市快速轨道交通网规划中的１３号线。它从北京西直门站起，向北经学院南路、大钟寺、清华园等地后，再向东经回龙观、北苑等地，然后向南经望京开发区，直
On the morning of December 11, 1999, the Beijing urban rapid rail transit railway line was started on the ground in the northern suburb. This urban rapid rail transit railway line is the No. 13 line in the planning of the Beijing urban rapid transit rail network. Starting from Xizhimen Station in Beijing, it passes northward through College South Road, Dazhong Temple and Qinghua Garden, and then eastward to Huilongguan and Beiyuan, and then to the south via Wangjing Development Zone.