To keep fresh hawthorn berries (山楂) longer, you can store them in the following ways:

1. Refrigeration: Place the fresh hawthorn berries in a breathable container or perforated plastic bag and store them in the refrigerator. This will help intain their freshness for up to a week.

2. Freezing: Wash and dry the hawthorn berries thoroughly before freezing them. Place them in a single layer on a baking sheet and freeze until firm. Then transfer the frozen berries to a freezer-safe bag or container. Frozen hawthorn berries can be stored for several months.

3. Drying: You can also dry fresh hawthorn berries to preserve them for a longer period. Wash and dry the berries, then spread them out on a baking sheet in a single layer. Place the baking sheet in a well-ventilated area or use a food dehydrator to dry the berries until they are shriveled and leathery. Store the dried hawthorn berries in an airtight container in a cool, dark place.

By following these methods, you can enjoy fresh hawthorn berries for an extended period of time.