Construction projects, including the project investigation, design, construction, supervision and procurement of important equipment and materials related to construction, the following are required to carry out bidding for construction projects: (a) large-scale infrastructure, public utilities and other projects related to the interests of the community ****, public safety; (b) the use of state-owned funds or state-funded projects; (c) the use of international organizations or foreign governments, loans, assistance funds. (B) all or part of the use of state-owned funds or state-financed projects; (C) the use of international organizations or foreign governments, loans, assistance to the project. Risk Warning: Involving national security, state secrets, disaster relief or the use of poverty alleviation funds to implement food for work, the need to use migrant workers and other special circumstances, it is not appropriate to carry out the bidding of the project, in accordance with the relevant provisions of the State can not be tendered.