One of the things the envoy from the Zui ministry of rites told Chu Yun was that on their wedding night, he and Xiao Zai should reveal to each other their beast selves -- as per Zui custom.
He went on about how sacred the beast self was in Zui, and how only one's family and spouse were allowed to see it.
In Xin things were a lot more relaxed. It was still the norm for only family members to see one another's beast forms. And while no one was walking the busy streets of Lanzhou one moment and shifting into full form the next to cut through the crowds as a fox, a slithering snake, or flying overhead as a crane, there wouldn't be any outrage if a small child did it by mistake, or an uncouth youth on purpose to get a rise out of his friends.
The Chu nine-tailed fox clan had been ruling Xin for centuries, and their rule had always been marked by temperance and tolerance.
