“…In R2, batches of samples 4 and 11 were also collected from Shaanxi province. In R3, batches of samples 13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29, and 30 were collected from Shanxi, Henan, and Guangxi provinces. HCA results enable the primary and non-primary producing areas, as well as superior and inferior products to be distinguished.…”