Identify the best substitute based on your dish: Pixian doubanjiang or gochujang + soy for stir-fries and braises; chili garlic sauce + soy for quick stir-fries; miso + chili or black bean paste + chili flakes for braises and stews.
Prepare the substitute by blending or mixing as needed (e.g., mix gochujang with soy sauce or combine miso paste with chili flakes).
Apply the substitute using the given ratios relative to doubanjiang and adjust salt or chili heat to taste.
Cook the dish accordingly, noting that substitutes like chili garlic sauce suit quick stir-fries while others benefit from longer simmering.
Taste and adjust seasoning or spice level before serving to ensure balanced flavor.