rivers and lakes / all corners of the country / remote areas to which hermits retreat / section of society operating independently of mainstream society, out of reach of the law / the milieu in which wuxia tales play out (cf. 武俠|武侠[wu3 xia2]) / (in late imperial times) world of traveling merchants, itinerant doctors, fortune tellers etc / demimonde / (in modern times) triads / secret gangster societies / underworld