It was near the end of the war that Grandma Li began selling Japanese rice balls wrapped in bamboo leaf to hungry train passengers. Soon afterwards the balls expanded to rice dinners, and in 1951 she introduced the use of special boxes made of moisture-absorbing wood. Thus was born the definitive Chihshang rice box.
在台灣光復前一年，李家老祖母見長途搭車的旅客中途找不到東西吃，十分辛苦，就用竹葉包日式飯糰賣給車上的乘客，後來改成飯包，民國四十年特地選用能吸水氣的木片盒子，成為池上飯包的招牌，至今已有五十三年歷史了。