This corpus provides the data that reflects the phonological system of three dialectal varieties spoken in the City of Yangquan, Shanxi, China, which are Yu Dialect (YD), Pingding Dialect (PD), and Jiaoqu Dialect (JD), belonging to Jin Dialects, Chinese. This corpus contains the data covering the initial system, the final system, the tonal system, the syllabic system, the disyllabic tone sandhi, and the other materials of each dialectal variety with about 6800 audio files. A PDF file gives a brief overview of this corpus; and three Excel files are provided as data lists for the three dialectal varieties, from which the data number and basic information for each speech file can be retrieved.