Nancha is a county in Heilongjiang Province, China, under the administration of the prefecture-level city of Yichun. It was reorganized from the former Nancha District by the Chinese State Council in 2019, and its county seat is Lianhe Subdistrict.
The reference material available on Nancha describes it only as a county in Heilongjiang; it does not provide information about a city named Nancha in Gansu, so no details about such a place can be given here.