Beijing Metro Line 4

Maintenance policies:

      To ensure the normal operation of system equipment in metro line 4, we provide all the necessary in-stop service, including but not limited to routine maintenance and periodic check and repair of system equipment,.

      We provide troubleshooting and repair services during operation of system equipment to lower the impact of equipment failure on the operational organization to the minimum.

      In case of specified service time by national or municipal government and buyer, we provide on-site support services, including but not limit to extending the operating time during major events, national holidays and so on.

      For failure occurring during operation of the system device, we will determine the exact reason of the failure, and take responsibility of replacing faulty equipment to reduce the pause time during various maintenance as much as we can and ensure the normal operation of the system.