Ecology suitability of Polygonum capitatum in Guizhou province based on topographical conditions Analysis of effect of topographical conditions on content of total alkaloid in Coptidis Rhizoma in Chongqin, China Production regionalization study of Glycyrrhiza uralensis Ecology suitability study of Cistanche deserticola in Alxa Ecology suitability study of Lomatogonium rotatum in Inner Mongolia Production regionalization study of Chinese angelica based on MaxEnt model Production regionalization study of Lycii Fructus