Single-source procurement days can open the bid?

After the single source procurement network, the registration unit needs to register to pay the bid deposit, but also to stay out of the preparation of bidding documents, only after the preparation of bidding documents to submit bidding documents to open the bidding, the general publicity of the network for five days, the preparation of bidding documents for fifteen days, a **** need to be twenty days can be opened to evaluate the bidding activities.