Question: what does Weihui and Weinan have in common?

Context paragraphs:
Weihui: Weihui (), formerly Jixian or Ji County (), is a county-level city in Henan, China.  It is under the administration of the prefecture-level city of Xinxiang.  The city has an area of 882 km² and a population of 480,000.

Weinan: Weinan () is a prefecture-level city in the east of Shaanxi province, China.  The city lies about 60 km east of the provincial capital Xi'an.

Supporting paragraphs: Weihui Weinan
Answer: China