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简介：The Great Wall was mostly in ruins, with many valleys, and it was difficult to defend with few soldiers. Even if a breakthrough was made, the whole line would be lost. The prince made it very clear in the secret report the disadvantages of holding on to the Great Wall. Emperor Chongzhen took it seriously, but the foreign ministers did not. Not understanding the prince's painstaking efforts, in the past two days, not only did some people ask the border troops to return to the Great Wall, strictly guard each valley entrance, and stop disturbing the people.