This is because of Tungchu's extensive tidal flats, where fish, shrimp, clams and crabs are available for the taking. If a guest shows up at the house just before dinner time, the host simply pops down to the beach to pick up something fresh for dinner.
此話乃因東莒島潮間帶大，魚、蝦、蛤、蟹唾手可得，炊飯時分若客人來訪，走一趟不遠的海邊就有活跳跳的海鮮宴客。