After Hao Ren and the four ascetics left "heaven", they teleported back to the market in the Southern Suburbs instead of home; firstly, it was because Chinese New Year was just around the corner and it was time to do some shopping—after all, his otherworldly tenants were having their first New Year there; secondly, he wanted the four ascetics to be oriented with local life, so that they would at least not put up under the TV tower again...
During the time in Raven 12345's place, the four ascetics had received some major mind remodeling. They had no problems conversing in Earth's language now.