The quota standards for public bidding are as follows:

1. The estimated price of a single construction contract is more than 4 million yuan;

2 important equipment, materials and other goods procurement, the estimated price of a single contract is more than 2 million yuan;

3. For the procurement of services such as survey, design and supervision, the estimated price of a single contract is above 1 10,000 yuan.

Legal objectivity:

Article 10 of the Bidding Law

Bidding is divided into open bidding and invitation bidding. Open tender means that the tenderer invites unspecified legal persons or other organizations to bid by means of tender announcement. Invitation to bid means that a tenderer invites a specific legal person or other organization to bid in the form of an invitation to bid.

Article 16

If the tenderer adopts the method of public bidding, it shall issue a tender announcement. The tender announcement of a project subject to tender according to law shall be published through newspapers, information networks or other media designated by the state. The tender announcement shall specify the name and address of the tenderer, the nature, quantity, place and time of implementation of the project subject to tender, and the way to obtain the tender documents.