Soak the white bird's nests in water, remove impurities and rinse thoroughly, drain them for later use;
Soak the selected lily bulbs in water for about 1 hour; remove the kernel of the red dates(XL) and rinse thoroughly for later use;
Rinse the lodoicea maldivica thoroughly, boil with 3 bowls of water at low heat for about 1.5 hours, filter it for later use;
Put all ingredients into a steaming pot, pour in the lodoicea maldivica solution (about 1½ bowls), stew over water for 30 minutes; add the rock sugar and stew until dissolved and serve.