四则混合运算是什么

简介：In the traditional sense, the Gyeonggi of the Ming Dynasty refers to the North Zhili area with the capital as the core, which is governed by the governor of Shuntian. However, since the governor of Baoding was added to Baoding and the governor of Tianjin was established, the meaning of the gyeonggi has changed slightly. Yongji, which was originally directly under the gyeonggi Qinghe Bazhou is now under the direct jurisdiction of the Governor of Baoding.