Which is more accurate, the weather forecast of the local meteorological observatory or the weather forecast of the Central Meteorological Observatory?

The weather forecast of CCTV is formed by summarizing the local forecasts reported by local meteorological stations. In fact, they are all accurate. However, CCTV generally summarizes the forecasts at 4 pm in various places. Some local stations will update the forecast at a later time (such as 6 o'clock). So sometimes there is a difference. Of course, the later the forecast time, the more accurate it is.