How to fry oil tofu until it is hollow?

Ingredients: tofu, vegetable oil, salt.

Kitchenware: pressure cooker, basin.

The preparation method of that hollow oil bean curd comprise the following step:

1. Wash fresh tofu and cut it into small pieces for later use.

2. After the wok is washed, add vegetable oil and proper amount of salt. After the wok is heated by high fire, put the tofu blocks into the oil pan and fry them over high fire.

3. Gently turn the tofu block with a spoon to make it evenly heated.

4. When the surface of tofu is slightly Huang Shi, turn to medium-low heat and fry slowly.

5. After all the bean curd blocks change color, take out and drain the oil to obtain the hollow oily bean curd.