 The effectiveness of the new walls was demonstrated in the failed Mongol raid of 1554, where raiders expecting a repeat of the events of 1550 were surprised by the higher wall and stiff Chinese resistance.The success of the wall did not always translate into political success for its builders.Detractors cited its high costs and the drain on military manpower as reasons for their opposition and in 1557 the Grand Coordinator Wu Jiahui (吳嘉會) was jailed on charges of embezzlement due to faulty and wasteful wall-building.