Chop your pork belly to ~1/2-inch cubes.
In a pan/wok over medium heat, add the olive oil until hot, then add in the pork belly cubes, and 3 to 4 broken off "corners" of a whole star anise.
Sautee until the pork belly becomes opaque, and golden brown on the outside, so that the fat has rendered out. The star anise bits will now be very dark brown - remove the star anise bits and discard.
While the pork belly is cooking, you can bring a separate pot of water to a boil for the noodles.
Add the shao xing wine over the pork belly and continue to stir until the alcohol has evaporated.
Add in the CBL soybean paste, dark soy sauce, regular soy sauce, and oyster sauce. Stir until evenly incorporated, and simmer for about 3-4 minutes.
Add in the brown sugar and stir until incorporated.
Remove the pan from heat and add in the sliced scallions, gently stirring to incorporate.
Once the pot of water is boiling, you can add the dried wheat noodles, and cook for 1-2 minutes less than the recommended time. Once the shortened time is reached, add in the sliced napa cabbage and continue to cook in the same pot for about 1-2 minutes. Remove from heat and drain, running for a few seconds under cold water so that the noodles don't stick to each other.
Top a bowl of noodles with 3-4 tbsp of the bean sauce, a small handful of the julienned cucumbers, and mix together until the sauce is evenly coating the noodles. Enjoy!