1. According to Article 8 of the Regulations for the Implementation of the Bidding Law, only those projects that must be subject to bidding according to law (hereinafter referred to as "state-owned investment projects") are subject to public bidding. According to the bidding law, projects invested by individuals also need bidding. If it does not fall within the scope of compulsory bidding stipulated in the Bidding Law, there is no need for bidding. However, as long as projects involving public safety are involved, tenders must be invited, no matter who the investor is.

2. Article 3 of the Bidding Law stipulates that "the following engineering construction projects, including engineering survey, design, construction, supervision and procurement of important equipment and materials related to engineering construction, must be subject to bidding:

(a) large-scale infrastructure, public utilities and other projects related to social interests and public safety;

(2) Projects that are wholly or partially invested with state-owned funds or financed by the state;

(3) Projects that use loans or aid funds from international organizations or foreign governments.