Drain the tofu, wrap in a clean kitchen towel, set on a plate and put a cast-iron skillet or other weighty object on top. Let it press for at least 10 minutes and up to 1 hour.

While the tofu is pressed, prepare the sauce: In a medium bowl, whisk the soy sauce, brown sugar, hoisin, rice wine, vinegar, sesame oil, white pepper, garlic, ginger, 2 teaspoons cornstarch and ⅓ cup water until combined.

After the tofu has been pressed, unwrap it and cut into ¾-inch cubes. Transfer tofu to a medium bowl, season with salt and coat in ¼ cup cornstarch; set aside.

In a large cast-iron skillet over medium-high heat, add enough neutral oil to coat the bottom of the pan. When it starts shimmering, add the tofu. Cook until one side is golden brown and crisp, about 3 minutes, then flip. Cook until the other side is crisp and golden brown, another 3 minutes. Remove with a slotted spoon and transfer to a plate.

Add the red bell pepper, celery and scallions. Cook, stirring occasionally, until the red bell pepper starts to soften while maintaining some bite and the vegetables char, about 4 minutes. Add the Sichuan peppercorns and chiles and cook until fragrant, about 1 minute. Add the tofu and sauce, and stir to coat; make sure the sauce simmers and thickens, about 2 minutes. Finish with the peanuts and cilantro, stir again, then serve immediately with rice.