招标投标的实质是招标人在市场上通过招投标这一市场竞争方式来选择一家中标人,在工程招标和政府采购方面以合理低价保质按时完成招标内容;在土地和国有产权出让方面以合理高价保质按时 The essence of the tendering and bidding is that the tenderee selects a successful bidder in the market through bidding and tendering competition and completes the bidding content timely and reasonably with low cost and durability in terms of project bidding and government procurement. In terms of land and assignment of state-owned property rights, High quality and durability on time