Distances across China are vast. It would take months to travel by foot from, say, Guangdong Province in southeastern China to Beijing in northern China. Even with a fast horse, it would take a month or at least several weeks. Wuxia characters, however, seemed to schlep from one end of China to the other in much shorter time.
We know that wuxia characters often use a burst of hing gung (lightness skill) to get away from enemies (or, if the characters are stronger than their enemies, to take advantage of their enemies), to negotiate through rough terrain (mountains or walls), or gain access to places not easily accessible to ordinary people. Is hing gung suitable for long-range travel? Some of the high-level martial artists had nearly inexhaustible inner power, which means they would effectively never fatigue. If so, they could conceivably use hing gung to leap for days on end. This would significantly cut down on travel time if it's feasible. Is it, however?