Dongyu provides clients with activities to determine and control the construction cost of projects and issue documents of project cost results. It mainly includes: investment estimation; preparation and review of construction project estimates, forecasts, settlements and completion (final) account reports; preparation and review of project bidding bases and bidding quotations in the implementation stage of construction projects; preparation and review of bills of quantities; changes in construction contract prices and calculation of claim costs; and at the same time provides services such as appraisal of economic disputes over project costs, cost monitoring of the whole process of projects, and project cost information.