Traditional Culture Encyclopedia - Hotel reservation - How big was the ancient Fiona Fang 800 Li? How is it calculated?

How big was the ancient Fiona Fang 800 Li? How is it calculated?

When Fiona Fang is used to refer to this area, it is actually just a square. It is also called "xx of Fiona Fang" and "xx Square". For example, "Fiona Fang 800 Li" refers to a square area with a side length of 800 Li, that is, 800 Li x800 Li = 640,000 square Li =160,000 square kilometers.