第一第二间断点怎么判断

简介：From Malanyu, Dianyuguan, Da'ankou, Luowenyu, Xifengkou, Qingshankou, and all the way to Jialingkou, it was a journey of 400 miles. It took six days in total. At each valley entrance, Zhu Cixiang had to stop for two to After three hours, we climbed up to the main tower of the valley, inspected the troops and equipment, and looked outside the pass.