The image shows a group of four military tanks on a winding road. The road is surrounded by a grassy hill on one side and a hill on the other. The sky is overcast and there are trees in the background. On the right side of the road, there is a red and white sign with Chinese characters on it. The sign reads "30", "40", "50", and "60". The tanks are arranged in a line and appear to be moving at a high speed.