Start by cooking noodles according to package directions and set aside.
Assemble shrimp marinade ingredients and marinade for 5-15 minutes.
Ground szechuan peppercorn, garlic, and thai chilis into a thick paste in a mortar and pestle. Alternatively, chop them until fine.
Heat a pan and spray with cooking span. Add in the chili peppercorn mixture along with the ginger, mushrooms, and onion and cook for 2-3 minutes.
Add in shrimp while reserving the marinade and cook about 1-2 minutes each side or until the shrimp begins to curl.
Mix in the doubanjiang, remaining marinade, and dark soy sauce in with the cooked noodles. Stir thoroughly until the sauce coats the noodles thoroughly.
Remove from heat, garnish with scallions, and enjoy the heat responsibly!