In the past, except for sea routes, Ilan's only link with the outside was an old dirt track, so it wasn't easy to get around. The best foods had to be able to stand extended journeys without spoiling, so it was best to pickle them first.
以前宜蘭對外，除了水路，只有一條草嶺古道，往外不易，豐富的物產要長時運送而不壞，只好先行醃漬。