There are many delicious foods in Haidian District, Beijing, including breakfast. The following are some popular breakfasts in Haidian District:

1. Pancake fruit: Pancake fruit is one of the most popular breakfasts in Haidian District. It consists of pancakes, eggs, fried dough sticks, bean skin, etc. It tastes crisp, fragrant and delicious.

2. Bean juice: Bean juice is one of the traditional breakfasts in Haidian District. It is made of mung beans and soybeans. It tastes sweet and sour and is very appetizing.

3. Mutton offal soup: Mutton offal soup is one of the popular breakfasts in Haidian District. It is composed of mutton tripe, mutton liver, mutton lung, onion, pepper, etc. It tastes delicious, spicy and delicious.

4. Wonton: Wonton is one of the popular breakfasts in Haidian District. It is composed of thin skin, pork, leeks, etc. It tastes delicious and very appetizing.

5. Tofu brain: Tofu brain is one of the traditional breakfasts in Haidian District. It is composed of soybean milk, gypsum powder, sugar, etc. It tastes delicate, sweet and delicious.

The above are some popular breakfasts in Haidian District. Of course, there are many other gourmet restaurants that are also very good. You can choose according to your own tastes and preferences.