Chen Wen-chien explains that this would be true at lower altitudes, but that the temperature at North Peak is too low, often below zero celsius. Thus all the vegetables freeze, and the frozen vegetables cannot be cooked, but only made into soup.
陳文仟說明，在平地是沒錯，但在北峰的溫度又太低了，經常在攝氏零度以下，所有蔬菜都結凍了，化冰後的蔬菜不能炒只能煮湯。