Yanhaven was a place more than 10 miles wide.
The Yan Clan’s influence was enormous, they controlled all regions within 500 km of Yanhaven. This sphere of control included millions of townsfolk. If one became the Mayor’s son in law, they would be able to enjoy all the power of the mayor. Moreover, since Yan Feixia studied at the True Dragon Institute, marrying her allow one to have a connection to the academy, so advancing one’s Arts cultivation would be incomparably simple.