Later, a professor he studied under, Yu Yue-hwa of National Taiwan University's Graduate Institute of Environmental Engineering, helped create a sustainable development plan in Bakkara, a village in northern Sumatra. That in turn planted the seed for Wu to sell "rainforest coffee" from Sumatra in Taiwan.
隨後他就讀的台大環工所指導教授於幼華參與了蘇門答臘北方 Bakkara 村的環境永續發展計劃，更種下如今吳子鈺在台灣賣起蘇門答臘「雨林咖啡」的種子。