There exist different view points about the deformation characteristics of the Indosinian Movement during late Middle Triassic in South oft-com:office:smarttags" />China. Someones emphasize on the importance of the Indosinian Movement or consider that the NNE-trending folds in Late Paleozoic cover were formed in the movement, while others hold that the movement was weak and the NNE-trending folds were formed in Yanshanian Movement, or later. The studies on the Late Triassic—Jurassic rudimental basins in Sandou of Zixin, Yaogangxian of Yizhang and Shatian of Guidong show that the unconformity surface under early Yanshanian tectonic layer incised the NNE-trending folds in Upper Paleozoic.