Answer: She feels they are hostile toward foreigners.
Explanation:
In Peking Dust, the author visited a department store at the behest of her rickshaw-boy who thought she would like it.
When they get inside however, she finds that unlike most places in China where foreigners were treated as superior, the people in the store were hostile to foreigners. The clerks did not bother attending to them and and some women whispered and giggled as they walked by.
