Hokkien immigrants to Taiwan originated from Quanzhou prefecture (44.8%) and Zhangzhou prefecture (35.2%). The original phonology from these regions was spread around Taiwan during the immigration process. With the advanced development of transportation and greater mobility of the Taiwanese population, Taiwanese speech has steered itself towards a mixture of Quanzhou and Zhangzhou speech, known as "Chiang–Chôan-lām" (漳泉濫, in Mandarin "Zhāng–Quán làn"). Due to different proportion of mixture, some regions are inclined more towards Quanzhou accent, while others are inclined more towards Zhangzhou accent.