Tied, which means that both qualifications must be met. In the tender documents, the double qualification with pause in the middle means that the two qualifications are in the same status and are in a state of juxtaposition, which must be met. What should be paid attention to in the bidding documents is that the format of the bidding documents, the part of the bidding letter, the construction period of various amounts and other data should be accurate, and the requirements such as signature and seal should be paid attention to.