Is Kang's Shanxi locust ancestor a Sogdian?

No. In the Ming Dynasty, the ancestors of the Kang family who immigrated to Sophora japonica were Pingyang and Taiyuan, Ze, Lu, Liao, Fen, Qinhe and Zhaocheng counties, not Sogdians. Sogdi is one of the ancient countries in the western regions recorded in ancient books in China, and its activities range from the Amu Darya River and the Syr Darya River in Central Asia to the seraph River Valley.