This is the lowest rated episode of the entire series.
In The Ember Island Players (2008), there is a joke in which the gang flies over the canyon with no further incidents as a joke for the sake of the audience.
The Gan-jins all seem to have long hair. This may be the result of a Confucian belief that since your parents gave you your body, it is not to be altered in any way, not even by cutting the hair.
"Zhang" is an Americanized pronunciation of the Chinese word for "dirty."
"The Gan-jins" literally means "The cleans."