Is it mandatory to post a demand announcement?

Demand notices are not mandatory. If it is public tender and competitive negotiation, it must be publicized, from the tender notice online to the bidding deadline, not less than twenty days. Procurement requirements should be in line with laws and regulations as well as the technical, service and security requirements stipulated in the government procurement policy. The public **** service projects provided by the government to the public, the public shall be consulted on the determination of procurement needs. In addition to detailed specifications or specific requirements that cannot be determined due to technical complexity or special nature, the procurement requirements shall be complete and clear. If necessary, the relevant suppliers and experts shall be consulted on the determination of procurement needs.

Article 18 of the Government Procurement Law of the People's Republic of China*** and the State of China

Purchasers procuring government procurement items that are included in the centralized purchasing catalog must entrust the centralized purchasing agency to act as agent for the procurement; purchasers procuring government procurement items that are not included in the centralized purchasing catalog may procure them on their own, or entrust the centralized purchasing agency to act as agent for them within the scope of the entrustment. Included in the centralized purchasing directory belongs to the general government procurement projects, should be entrusted to the centralized purchasing agency agency procurement; belonging to the department, the system has special requirements of the project, should be implemented departmental centralized purchasing; belonging to the unit has special requirements of the project, approved by the people's government at or above the provincial level, can be purchased by themselves.