Bóyě
Boye lies on the plain of central Hebei and was the ancestral home of the Cheng family of Zhongshan. The brothers Cheng Hao and Cheng Yi, influential Song thinkers and teachers, belonged to this lineage. Their teachings on principle became an important part of later Confucian thought. In 1330 the Yuan court granted the brothers posthumous ducal titles, marking the continuing esteem in which their scholarship was held.