The bidder can't make bold to withdraw the bid or to modify it in the period of validity of the bid.

投标人在标函有效期内不得擅自撤回投标或修改标函。

youdao

The bidder can't make bold to withdraw the bid or to modify it in the period of validity of the bid.

投标人在标函有效期内不得擅自撤回投标或修改标函。

youdao