According to Chang, the current mayor of Oyama visited Wulai 15 years ago, and the place left a huge impression on him, so he organized the sister city agreement between the two through the Interchange Association, Japan.
張金榮指出，大山町町長在十五年前造訪過烏來，對烏來印象深刻，因此主動透過日本交流協會前來聯繫。