Begin by prepping all your ingredients. Cut the chicken breast, beef, and shrimp into bite-sized pieces. Chop the bell pepper, snow peas, baby corn, and broccoli into small pieces as well.
In a bowl or measuring cup, whisk together the Chinese five-spice powder, soy sauce, oyster sauce, sugar, and cornstarch with the chicken stock. Set aside.
Heat a wok or large skillet over medium-high heat and add 2 tablespoons of peanut oil. Add the chicken and cook it until it is browned on all sides (around 5 minutes). Transfer the cooked chicken to a plate, then add another tablespoon of oil to the pan.
Add the beef and cook for 2 minutes, then add the shrimp and stir-fry for another 3 minutes. Once the beef and shrimp are cooked through, add the vegetables to the pan and cook for an additional 2 minutes.
Return the chicken to the pan and pour in the sauce mixture you prepared earlier. Stir everything together and allow it to cook for a few more minutes until the sauce has thickened and all of the ingredients are coated in the sauce.
Serve your Triple Delight Chinese Food with steamed rice or your favorite noodles.