According to the provisions of the Bidding Law:

"Article 15 A bidding agency shall handle bidding matters within the scope entrusted by the tenderer and abide by the provisions of this Law on tenderers."

"Article 45 After the winning bidder is determined, the tenderer shall issue a bid-winning notice to the winning bidder, and at the same time notify all bidders who have not won the bid. The bid-winning notice has legal effect on the tenderer and the winning bidder. After the bid-winning notice is issued, if the tenderer changes the bid-winning result, or if the winning bidder abandons the bid-winning project, it shall bear legal responsibility according to law. ?”

the tendering agency shall issue the bid-winning notice on behalf of the tenderee, and must know the bid-winning unit.