According to statistics, the monthly output of red-yolk eggs from free-range ducks in the Ssuchunghsi hot springs area should be only 60-70,000 eggs. However, in recent years, as the number of visitors coming to the Hengchun Peninsula has burgeoned, inauthentic goods have been mixed in with the authentic, and one sees a worrisome sales volume of 2 million "red-yolk" eggs per month.
根據統計，真正原產於四重溪溫泉區、採放養方式所產的正牌紅仁鴨蛋，月產量僅 6、7 萬顆；但近年來隨著恆春半島遊客激增，魚目混珠下，月銷售量竟「號稱」200 萬顆，令潘旭煌十分憂心。