All bids must be accompanied by a bid security of two per cent ( 2 % ) of total bid price or stated fixed amount and must be delivered in accordance with the instructions to bidders on or before ( hours ) on ( date ) , and will be publicly opened immediately thereafter 所有的投標者都需繳納總投標價的百分之二( 2 )或一定金額的保證金,并按投標需知于開標前交清,然后立即公開開標。