The bridge area within the service radius of Chongqing Guanyin Bridge is divided by the total bridge area multiplied by 100%. According to the personal library network, the service radius of Chongqing Guanyin Bridge is equal to the area of the bridge within the service radius of Chongqing Guanyin Bridge divided by the total area of the bridge multiplied by 100%. Radius In classical geometry, the radius of a circle or circle is any line segment from its center to its periphery, and in more modern usage, it is also the length of any one of them.