However, the Yunan movement occurred in lately Cambrian-early Ordovician finished the basin character change, and in space, the basin evolution character was from southeast to northwest.

• 盆地演化经历了从被动大陆边缘到前陆盆地一个完整的构造旋回，盆地性质的转化是通过奥陶／寒武纪之间的郁南运动，由南东向北西方向推进；