The estimated price of a single construction contract is more than 2 million yuan; The estimated price of a single contract for the procurement of important equipment, materials and other goods is more than 6,543,800 yuan; The estimated price of a single contract for service procurement such as survey, design and supervision is more than 500,000 yuan; If the total investment is more than 30 million yuan, bidding is needed.

Extended data:

The parties to service bidding mainly include the tenderee (purchaser), bidding agency and bidder.

A tenderer (purchaser) is a legal person or other organization that submits a project subject to tender according to law.

Bidding and purchasing agency is a social intermediary organization established according to law, engaged in bidding and purchasing agency business and providing related services.

The tenderer (purchaser) may entrust a bidding agency to handle the service bidding according to law, or organize the service bidding activities by itself. The following "bidding procurement units" include tenderers (purchasers) and bidding procurement agencies.

Bidders are suppliers who respond to bids and participate in bidding competition.