1. Steam chicken for 25 min until cooked, remove from heat to cool, then shred thickly with hand, chop up the bones and keep the skin, set aside.
2. Soak fish maw for 1/2 hr till softened, slice thickly, then blanch in salted water, drain and squeeze liquid out, set aside.
3. Heat wok, drizzle a little oil, pan fry chicken bones and skin until fragrant, pour chicken stock in, boil in high heat until the stock turns creamy white and thick, turn heat off, drain bones and skin.
4. Bring the stock to a boil again, add fish maw slices until they fully absorb the flavour, season with salt and sugar, then add shredded chicken, turn to low heat, add corn starch and water mixture little by little to thicken the soup.