1. Dice spring onion and shred garlic. Peel potato and slice it, then cut it in strips. Cut eggplant in pieces then cut in strips.
2. Deep fry eggplant and potato separately.
3. Heat the oil, stir fry spring onion and garlic. Put in coarse bean paste and sweet bean paste and stir fry. Put in Shao Xing wine and sugar. Put in 2 Tablespoons of water. Stir fry with potato and eggplant.