When all other ingredients are sliced and prepped, heat clean wok over medium heat and add 1 tablespoon oil. Add cucumber, celery and bean sprouts and stir-fry briefly, just enough to break their rawness, not cook them through. Remove them to a deep serving bowl.
Add the tengjiao oil and neutral oil to a very small sauce pan and slowly heat them up while you cook the fish.
Add another 2 tablespoons oil to the wok and stir-fry the sliced ginger and sliced garlic briefly. Return the fish stock to the wok and bring to a boil.
Reduce heat and add the fish slices to the simmering stock piece by piece to make sure they don't stick together (easiest done with your hands). Do not stir. Make sure the stock is not at a boil, as you want to gently poach the fish. Cook until fish is just cooked through, as you don't want to overcook it.
Pour the full contents of the wok over the waiting vegetables in the large serving bowl. Top the fish with the fresh chili slices and green Sichuan pepper. When the tengjiao oil mixture is bordering on smoking (but NOT smoking), pour it over the top of the dish, where it will sizzle the chilies and Sichuan pepper and release their flavors.
Serve with rice and remember not to eat the Sichuan pepper or drink the broth. Spoon morsels of fish and vegetable onto your rice.