There is a water gate at the side of the river, on which are carved the three Chinese characters for Kou River Channel. These were written in 1969 by the ROC ambassador at the time, Hsu Mao-hsi.
河旁有個水門，上面由當時我國駐布國大使徐懋禧題有「姑河渠」三個字，時間為一九六九年。