Wok-tossed noodles seared over ferocious heat with spring onions, beansprouts, aromatic garlic, and savoury seasoned sauce.
Marinate the beef with cornflour and salt for 15 minutes.
Soak the rice noodles in hot water until pliable, then drain.
Stir-fry the beef in a hot wok until browned, then remove.
Fry the chilies and garlic in the remaining oil until fragrant.
Add the noodles, doubanjiang, and black vinegar and toss over high heat.
Return the beef and toss until everything is glossy and hot.
Serve immediately.