Sòngdài bǎ biān dì xiǎo de xíngzhèngqū chēngwéi dòng.
Under the Song, a small frontier district was called a dong.
Tips
history
Read 峒 for the 'cave' sense and for the historical settlement unit of the Miao, Dong and Zhuang peoples (the ethnonym 侗族 is linked to it). A separate reading 峒 appears in the mountain name 崆峒.