If you don't win the bid, how can Party B call for details?

Under normal circumstances, if there is a specified time in the tender documents, you can call for advice or wait for a notice. Generally, the bidder will send a notice, and the bidder will also send a notice or call. There are many official government release channels, national public resource trading platforms and prefecture-level cities. The government designated online media to publish bidding laws, regulations and normative documents, administrative licensing, administrative decision-making, market supervision and services and other related information. If you don't use it often and don't need too much information, you can check it on the local website. Then go to some bidding information websites, such as China Bidding Network, and many websites that have won the bid. It basically covers standard news from all walks of life. For example, if you win more bids, you can update about100000 latest bid messages every day, which is still very complete.