However the clients take a long time for feedback to us (around 48 hours) and there are some additional feedback are not in the first brief. So everybody concern about if client take a long time for feedback and have the additional feedback in every revision, we will not meet the deadline. Moreover we can not invoice for first lot soon. P'Wat told that if we are not approved any cards in the lot 1 once this revision, he afraid that it will make us out of schedule.