It may be caused by the bidder's own reasons, unstable network, too large bidding documents or technical factors of bidding trading platform.

Solution:

1. The tenderee and the operator of the electronic bidding trading platform can strengthen the pre-training to ensure that the bidder can be familiar with and master the system operation. Customer service hotline service should be provided before bid opening to answer technical questions of bidders at any time, especially for bidders with a large number of bidders and new bidders who participate in bidding for the first time, targeted training and business guidance should be provided to reduce the technical risk of unsuccessful uploading.

2. Bidders should strengthen technical measures to prevent the risk of interception of electronic bidding information. The execution of bidding business must be carried out in a safe environment, and the transmission of sensitive data must be encrypted.