Wash the raw rice before cooking, and wash rice in cold water until the water runs clear. Drain the rice and set it aside.
Cut the sirloin into small cubes for later use. Mix the beef with cornstarch, Chinese Shaoxing wine, soy sauce, sesame oil, salt, and white pepper. Let it marinate for at least 15-20 minutes.
Bring the water to a boil at medium-high heat in a large pot. Add the rice and reduce the heat to low. Cover the pot and let it simmer for 30 minutes, occasionally stirring to prevent sticking.
Once the rice has become porridge-like in texture, slowly add the marinated beef cubes to the plain congee while it is cooking. Stir well and cook until browned on all sides, about 5 minutes, or until the beef is tender.
You can season with additional salt and pepper and beef bouillon to taste if you need it. Turn off the heat.
Serve the beef congee hot, garnished with chopped green onions, ginger strips, and other optional toppings.
Enjoy your delicious bowl of beef congee!