It is just this process, Ch'u Ko believes, that transforms Ou's sketches into evocative landscape paintings expressing the ancient ideal of "hills and valleys in the artist's heart."
楚戈認為歐豪年的寫生山水，是運用「似中求意」的技巧，抒發而成「胸中自有丘壑」的寫意山水，正是這種歷程下的產物。