Exit numbering has been standardised in China from its inception. Most Chinese expressways, especially those in the national network, use distance-based exit numbering, with the last three numbers before the decimal point taken used as the exit number. Hence, an exit present at km 982.7 would be Exit 982, whereas an exit at km 3,121.2 would be Exit 121. Unlike American exit numbering systems that reset at each state line a freeway crosses, exits on Chinese expressways increase along the total length of the freeway, regardless of how many provincial boundaries the expressway crosses.