Li Chien was reaching the end of the road when he discovered konjacs growing plentifully in the mountains of Okinawa, so he assembled a gang of temporary workers to pick 30,000 konjacs and sold them in Japan at US $ 3 apiece.
李堅在山窮水盡時，發現琉球郊區滿山遍野的姑婆芋長得好不豐美，於是找了一批臨時工人，採集了三萬株姑婆芋，以一株美金三元賣到日本。