First, national key projects and local key projects determined by the people's governments of provinces, autonomous regions and municipalities directly under the Central Government (Article 11 of the Bidding Law);

Second, projects that must be subject to tender according to law with state-owned funds holding or leading position (Article 8 of the Regulations for the Implementation of the Bidding Law);

Third, other laws and regulations require public bidding projects. For example, Article 26 of the Government Procurement Law stipulates that public bidding should be the main procurement method for government procurement; Article 26 of the Regulations on Land Reclamation stipulates that if the government invests in land reclamation, the relevant competent departments of land and resources shall, in accordance with the provisions of laws and regulations on bidding, determine the construction unit of the land reclamation project through public bidding.