1 has different meanings.

Trial operation refers to the non-passenger operation after the civil engineering and electromechanical engineering of rail transit pass the initial inspection and complete the system debugging. During the trial operation, the availability, safety and reliability of the subway equipment system and the whole system will be tested and evaluated, as well as the training of operators, fault simulation and emergency drills, and problems will be found and rectified in time until the requirements are met.

Trial operation is a passenger operation activity before all facilities and equipment of urban rail transit project pass the trial operation inspection, and the overall system availability, safety and reliability pass the "trial operation" inspection, and are accepted by relevant departments.

2, the time is different.

Trial operation is a necessary intermediate link for rail transit from construction stage to passenger operation stage. Usually, the trial operation time is not less than 3 months, and the train runs on the track with no load and does not sell tickets to carry passengers. The trial operation time shall not be less than 1 year. During this period, passengers can buy tickets to take the subway.

Official operation of subway

1 year trial operation of passengers and completion of the tail project construction and defect rectification, the rail transit operating unit may apply to the competent department for formal operation. After comprehensive evaluation and review, the rail transit line can be transferred from trial operation to formal operation. Also during the trial operation, various indicators, facilities and equipment reliability and other data need daily statistics and reports.