1. Upon inquiry, the Standard Provisions on Bidding Scope and Scale of Engineering Construction Projects shows that if the survey, design, construction, supervision and procurement of important equipment and materials related to engineering construction meet one of the following standards, bidding must be conducted: if the estimated price of a single contract for construction is more than 2 million yuan, the estimated price of a single contract for procurement of important equipment and materials is more than 1 10,000 yuan. The estimated price of a single contract for service procurement such as survey, design and supervision is more than 500,000 yuan. The estimated price of a single contract is lower than the standards specified in 1, 2 and 3, but the total investment of the project is more than 30 million yuan. Therefore, the maintenance cost of 1 10,000 yuan is below the limit, and it is legal without bidding.

2. Bidding is a term in the bidding industry, which refers to the behavior of putting forward the variety, quantity, technical requirements and related trading conditions of bidding by issuing a tender announcement or tender sheet in advance, and inviting bidders to participate in bidding at a specified time and place.