Ilan County was the first local government to move into "public production" (publicly administered for-profit production) of rock and gravel. It has been operating this line of business for more than eight years.
宜蘭縣是全國最早辦理砂石「公共造產」（即由政府經營收益事業）的地方政府，自 1999 年開辦至今已超過 8 年。