特变电工对于所提供的工程建造项目，根据履约进度在一段时间内确认收入。履

TBEA will recognize revenue for the construction projects provided within a period of time based on the progress of the contract performance. The progress of the performance of the contract is determined by the input method during the contract period, and is determined based on the proportion of the completed contract cost actually incurred for the performance of the contract to the estimated total cost of the contract. The management estimates the estimated total revenue and estimated total cost of the project at the beginning of the project, and continuously evaluates and revises it during the execution of the contract. The determination of estimated total revenue, estimated total cost and performance progress involves important accounting estimates and judgments of the management, and has a significant impact on the amount and period of revenue recognition.

Special electricians recognize revenue over a period of time in accordance with the progress of performance for the construction projects provided. The performance progress is determined by the input method during the contract period, based on the proportion of the contract cost actually incurred to perform the contract as a proportion of the estimated total cost of the contract. Management estimates the projected total revenue and estimated total cost of the project at the beginning of the project and continuously evaluates and revises the contract execution process. The determination of projected total revenue, estimated total cost, and performance progress involves significant accounting estimates and judgments by management and has a material impact on the amount and duration of revenue recognition.

TBEA shall recognize the income of the construction project provided within a period of time according to the performance schedule. The performance schedule is determined by the input method during the contract period according to the proportion of the completed contract cost actually incurred for the performance of the contract to the estimated total cost of the contract. The management estimates the estimated total revenue and estimated total cost of the project at the beginning of the project, and continuously evaluates and revises the project during the execution of the contract. The determination of estimated total revenue, estimated total cost and performance schedule involves important accounting estimates and judgments of the management, and has a significant impact on the amount and period of revenue recognition.<br>