Direct procurement refers to the procurement of direct contact with local suppliers, and cross-border procurement refers to the procurement of supplies across geographic boundaries, with supplies from other countries, without conducting the procurement process within the territory.
Centralized purchasing includes institutional centralized purchasing and departmental centralized purchasing, the catalog belongs to the general 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.