Ouyang Ch'iao-huei, a professor of civil engineering at National Central University, says that the primary thing is to avoid errors in construction and planning, which can entail needless expenses.
中央大學土木工程系教授歐陽嶠暉則指出：更重要的是，事先避免治河時犯錯，往往能省下大筆冤枉的開支。