After the rind color was stabilized, Chen spent another six years breeding the watermelon to develop a more appealing shape, redden the flesh and boost the sugar content because the wild South American varieties weren't sweet enough, were too seedy and had white flesh.
果皮顏色穩定後，又因南美洲野生種甜度不夠、多籽、果肉呈白色，為了讓果型美觀、果肉豔紅、糖度提高，又花了 6 年才改良成功。