What does the weather forecast of Central Meteorological Observatory 1-7 mean?

The meaning of this sentence is to retrieve the weather forecast map for the next 1-7 days released by the Central Meteorological Observatory, and adjust or update it.

This usually refers to updating the data in the weather forecast chart to reflect the latest weather conditions or forecasts. This operation is because the meteorological department has collected new meteorological data, or because the weather conditions have changed, it is necessary to update the forecast map to reflect the future weather trend more accurately.