After the Yongzheng emperor (1723-1736) took the throne, the area of Taiwan stretching from today's Changhwa in the center to Tamsui in the north, was upgraded to the administration of the Tamsui provincial government office. In 1756, with prosperity spreading northwards through the island, the Tamsui yamen--the office of the principal governing official--was formally relocated in Chuchien.
雍正即位後將現今彰化到淡水一帶升設為淡水廳，隨著由南而北的繁榮腳步，至乾隆二十一年（西元一七五六年），主政官員的辦公衙門「淡水廳署」就正式遷移、設置在竹塹。