The invitation tender is a kind of trading method in which the tenderer does not go through the general transaction consultation procedure before buying and selling bulk commodities, contracting construction projects or cooperating in a certain business, but invites the applicant to submit an offer to compete publicly, and finally the tenderer chooses the object of the transaction to make a contract.
 Boss Zhang intends to issue a notice of bidding for the construction project of the city's villa group to units with corresponding construction qualifications inside and outside the province is the invitation tender.