To further implement the city's construction enterprise qualification approval and safety management requirements, and to better regulate the bidding process, the following notice regarding the bid restriction measures against non-compliant enterprises in the bidding activities for housing construction and municipal infrastructure projects within the city is hereby issued: 1. Types of Bid Restriction Measures Enterprises that violate the city's construction qualification approval and safety management regulations shall, based on the severity of the violation, be subject to corresponding bid restriction measures in the bidding activities for housing construction and municipal infrastructure projects within the city, which include mandatory bid restrictions and selective bid restrictions.