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                | radish | remove small rootlets  and scrub with  a brush to  remove dirt. Cut  into 1.5cm (1/2 inch) cubes. Radish is quite juicy, so it is a good idea to remove some of the juice by salting lightly in salted water. Rinse with water and drain. |  
                | young scallion, leaf mustard, dropwort | young  scallion; clean and wash. Cut into  3cm (1 1/5 inch) pieces. |  
                | oyster | choose fat and solid ones. Wash in salted water and drain. |  
                | shrimp juice | gather up the solid part and mince. |  
                | garlic and ginger | clean and wash. Mince. |  |