1. Construction project cost management department of Ningxia Hui Autonomous Region: You can contact the construction project cost management department of Ningxia Hui Autonomous Region or relevant construction project management institutions to consult and purchase relevant valuation basis documents.
2. Online bookstores or e-commerce platforms: You can try to search for relevant publications, such as manuals, manuals and guides, in major online bookstores or e-commerce platforms. , according to the Ningxia Hui Autonomous Region construction project cost valuation. These platforms often provide a variety of paper books or digital versions for purchase.
3. Construction Industry Association or Society: You can also consult the local construction industry association or society to find out whether there are relevant suggestions or guidance documents.