Whisk the hoisin sauce, soy sauce, honey, wine, five-spice, garlic, and ginger in a bowl.
Add the pork and coat well. Cover and refrigerate for at least 4 hours or overnight.
Roast and Glaze:
Heat the oven to 425 F. Set the pork on a wire rack over a lined roasting pan and add a little water to the pan.
Roast for 25 minutes, turning once. Brush with the reserved honey and hoisin mixture, then roast 10 to 15 minutes more until the edges are caramelized and the pork reaches 145 F.
Rest the pork for 10 minutes before slicing thinly across the grain.
Serve:
Serve the char siu over warm jasmine rice and scatter with sliced scallions.
Notes
Marinate overnight for the deepest flavor.
Keep water in the roasting pan to reduce scorching drips.
Rest before slicing so the juices stay in the pork.