I don’t know, but word is that the Chinese in particular are very rude & crude about such things. Hong Kongers are not fond of visitors from China because of the Chinese lack of manners. (By “Chinese”, I mean the country, not the racial-ethnic group - most people in HK are of Chinese descent.)
There seems to be an uptick in the number of reported incidents of Rude behavior involoving chinese persons. .
One of my old supervisors had noticed this on his trips to China. Between the manners and the hygiene, the hinterlands were an adventure for him.
His tale of getting to and using a small latrine - on stilts - that served an entire factory was particularly entertaining.