Put the flour and salt in a bowl. Add water and knead everything by hand until a smooth dough is formed.
Now leave the dough covered with foil for 30 minutes.
Then knead well again until the dough is smooth and shiny, and it feels firm and elastic. Then leave to rest covered for 30 minutes.
Now divide the dough into two parts and roll it out to an approx — 0.5-1cm thick rectangle.
Rub the rectangles on each side with 1 tablespoon of oil and let it rest wrapped in cling film for another 2 hours.
Remove the foil and cut the shorter side of the dough into strips about 1 cm wide with a knife.
Hold the strips at the ends and pull apart.
Put the drawn pasta in boiling salted water and cook until bite-proof.
Briefly boil the pak choi and broccoli in the same water.
For the beef soup
Cut the dried chilies into approx. 1 cm pieces and soak them in warm water for approx. 30 minutes.
Finely dice the onions and roughly chop the garlic.
Peel the carrots and cut them into slices about 1 cm thick.
Cut the beef calf into pieces about 5x3cm. Place the pieces in a saucepan with boiling water and cook briefly with the lid closed for approx. 5 minutes so that the excess protein forms a foam on the water surface.
Drain the meat and rinse with cold water and drain.
Allow the soaked chilies to drain in a small sieve.
Put enough rapeseed oil in a roaster so that the bottom is slightly covered. Heat on a small to medium heat and sauté the chilies and Szechuan peppers slowly for a few minutes.
Then add the onions and garlic. When the onions are glassy, add the meat and let it sauté briefly while stirring.
Now pour 2.5L of hot water on top and add ginger, bay leaves, cinnamon stick, star anise, Doubanjiang, both soy sauces, and salt. Stir once and simmer on low heat with the lid closed for at least 2 hours.
Add the carrot slices about 20 minutes before the end of the cooking time and cook with them.
You should only use one hand to knead the dough. In doing so, flatten the dough repeatedly with the ball of your hand and fold it to the center.