How to Make Preserved Egg and Tofu Soup?

Ingredients:Water melon gourd 1 piece, tofu pudding Tofu Half a box,Duck eggs 2 pieces, an appropriate amount of salad oil, 1000ml water, two small spoons of salt,Chicken essenceBlack pepper A little bit
Steps:
1. Peel the water melon gourd and cut it into cubes;
2. Turn out the tofu pudding from its box, then slice it into small cube pieces with a knife;
3. Peel the duck eggs and cut them into small pieces;
4. Heat a little oil in a wok until it's very hot,and cook the water melon gourd cubes until they are eight-tenths done.
5. Cook until the water melon gourds become soft, then add water and salt, mix well;
6. Add duck egg pieces and tofu cubes, cook until it boils, then switch to low heat and simmer for about 2 minutes. Add a little chicken essence and black pepper seasoning, stir evenly before turning off the fire.