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"First, when we were video chatting with each other a few minutes after 7:35 yesterday, we vaguely heard the sound of a train passing by. There are two railway lines in our city, one from northeast to southwest, and one from east to west. We checked the train schedule from 7:00 to 8:00, and only There was a G265N train passing through the railway line from northeast to southwest during this time period. From this, we determined that the location where Zhang Meng was kidnapped and detained must be near the northeast to southwest railway line." Ran Xiaoke's mouth was dry and he took a sip of the mineral water handed over by Zhao Yixin. "Go on," the deputy director nodded. "Second, simply knowing that we are along this railway line is far from enough to grasp the specific location in a short period of time. Fortunately, when I was watching the video this morning, God opened my eyes and I saw the rising sun shining through the middle of the curtains. I noted down the time point A and the time point B when the rising sun disappeared from the curtains. As we all know, the rotation of the earth creates day and night. , The time difference between the two time points, combined with the earth's rotation speed of 465 meters per second, is used to calculate the angle between the earth's rotation between this time difference, and then substituted into the radius of the sun and the earth, it is easy to calculate the point where the line connecting the center of the earth and the center of the sun intersects with the earth's surface. This point is where the house where Zhang Meng was imprisoned is located!" Ran Xiaoke finished the calculation process in one breath. "Yes, you can still calculate while negotiating," the deputy director praised.