China's national highway system has been designed in a radiating and netted form, and the highways have been numbered in three different ways. The highways radiating from
Beijing, the capital of
China, are numbered clockwise from 101 to 112.The serial numbers of the highways running from north to south are 201 to 228, numbered from east to west, while the serial numbers of the highways running from east to west are 301 to 330, numbered from north to south.