Smoked Tofu with Celery and Peanuts

Name: Smoked Tofu with Celery and Peanuts (Liang Ban Dou Fu Gan 涼拌豆腐乾)
Cuisine: Chinese
Ingredients: 1½ tbsp chilli oil with ½ tbsp of its sediment, to taste; 100 g smoked or spiced firm tofu; Salt, to taste; 3 celery sticks (about 125 g); Good pinch of caster sugar