Cut the beef brisket into bite-sized pieces.
Slice the onion and green onion into thin strips.
Heat oil in a pan and stir-fry the beef brisket.
When the brisket is about halfway cooked, add the onion and green onion and continue to stir-fry.
Season with soy sauce, sugar, and cooking wine.
Place the stir-fried ingredients on top of the rice.
Optionally, top with a raw egg yolk and drizzle with sesame oil.