Cook and drain noodles according to package directions.
While you're waiting for the noodle water to boil, heat a wok or skillet over medium-high heat and add peanut oil. When the oil shimmers, toss in the ground pork. Stir fry the meat until brown, 4 to 5 minutes, then add the hoisin sauce, sesame oil, and Shaoxing wine. Cook for 2-3 minutes longer and set aside.
Add sesame paste, soy sauce, sugar, and garlic into a bowl along with 1/2 cup chili oil and mix generously. Add 1/4 cup hot water (use the pasta water if the timing works) and stir until combined.
In a small bowl, add ¼ cup of the dan dan sauce and the ground pork. Stir in the already cooked noodles and leafy greens. Top with sesame seeds, scallions, and Sichuan chili peppercorn powder.