What is the reason or principle for CCTV weather forecast to rank cities?

Beijing is special because it is the capital.

Latitude from high to low, from north to south; Longitude from low to high, from west to east, and it is broadcast in large areas and nearby areas, and the area with the highest latitude is broadcast first. Northeast (including Beijing-Tianjin-Hohhot)-Northwest-Southwest-Central China-East China-South China.