This study found out that the South China sea junction belt and the orogenic belt formed from the deep-water rift trough from Late Neoproterzoic to Early Palaeozoic Era are concealed below the Jiuling and Wannian thrust nappes and the sedimentary covers since Late Palaeozoic Era. On both sides of the orogenic belt are respectively the Low Yangtze Block and the Xinjiang—Qiantang Block, the residual Cathaysian Block. The Meso-Neoproterozoic geological bodies (about 860 Ma ago) in the Yangtze continent margin and the southwestern part of Xinjiang—Qiantang block of the Cathaysian continent margin were all subducted and overlapped here. It was until Mesozoic Era, about a half of the northern part of the depression was not overlapped by the Jiuling thrust nappe. Therefore strong orogenesis has completely changed the traditional concept of “Jiangnan Ancient Land”. It is through the window that we can catch a sight of connection between the complexity of deep-seated geological structures and large-scale of mineralization in the South China Continent.