Take a look at the map Places of Origin of Premiers and Ministers of Eight Ministries in Yap's article "Who Governs Taiwan?" and you'll find that the lion's share of KMT leaders have originated from Jiangsu and Zhejiang provinces, while many DPP leaders have come from Chiayi and Tainan. It appears that regional connections play an important function.
一文中的「行政院長暨八部首長出身地」地圖，你會發現，國民黨政府的首長有許多來自江蘇、浙江；而民進黨政府的首長多來自嘉義、台南，其中地緣與人脈關係似乎起了重要作用。