Analysis of information sources in references of the Wikipedia article "Shaanxi" in English language version.
In early periods Chinese of various types was spoken in an area stretching from the north China plain westward into the more rugged areas covered by modern Shanshi and Shaanshi.
In early periods Chinese of various types was spoken in an area stretching from the north China plain westward into the more rugged areas covered by modern Shanshi and Shaanshi.