How to make taro with preserved vegetables in porridge

1 taro, 3 slices of Chinese cabbage, an appropriate amount of carrots, a small handful of preserved vegetables, 2 dried shiitake mushrooms, 3 fresh shiitake mushrooms, 1 king oyster mushroom, 1 bowl of mushroom water, appropriate amount of water, appropriate amount of rice, appropriate amount of white pepper, appropriate amount of salt, appropriate amount of sugar