Bq refers to prepare the tender documents by has ability of the tenderer, or affected by the entrusted with the corresponding qualifications of intermediary agencies, in accordance with the construction project code of valuation with GB50500-2008, according to the bidding notes, construction drawings and construction projects, preparation of division of sectional engineering projects, measures program and other project's name and the corresponding amount of detail form, Bidder is according to the bidding documents to the list of quantities and tube requirements, the construction site actual situation and worked out the construction scheme or construction design, according to enterprise ration and the market price information, combined with the market competition and full consideration of risk, independent quotation, and through the market competition formation price valuation method.