墟市是岭南乡间农产品和家庭手工业品交换的场所。乡民趁墟,亦农亦商、互通有无。北亭的官山与昌华曾经是岛上农产品交易的集散地。一墟两市的兴旺和发展是在清末民初。百年过去了,如今北亭还流传着“一墟两市, Market is Lingnan rural agricultural products and household handicrafts exchange place. The villagers taking advantage of the market, but also farmers also trade, exchange of presence or absence. Guanting and Changhua in North Pavilion used to be the distributing center of agricultural products on the island. The prosperity and development of one market and two cities is at the end of the Qing Dynasty and the beginning of the Republic of China. A hundred years later, now North Pavilion also circulating "a market two cities,