Three years ago, the Peinan River out in front of their property was the site of a proposed gravel pit. Tu and his neighbors banded together and started a petition, going to the Luyeh town hall to protest. After several rounds of negotiations, plans for the gravel pit were scrapped, and all its machinery and equipment was hauled away.
三年前，前面的卑南溪有人要建砂石場，杜建坊聯合鄰居，發動聯合簽名，赴鹿野鄉公所抗議，幾經協調，最後砂石場沒能蓋成，器具設備也都撤走了。