In March 1983, in early spring, Tsai traveled to Chiayang on Mt. Li to await the butterflies, but found that he had arrived too early, for the sassafras trees had not yet budded. However, three months later, when the trees were green, the broad-tailed swallowtails were nowhere to be seen.
1983 年初春 3 月，蔡百峻到梨山佳陽附近等待，只是來早了，擦樹尚未長新芽；之後 3 個月過去了，擦樹已綠意盎然，卻仍不見蝶蹤。