What does it mean to diffuse from other provinces?

People from other provinces are people who come to the current province or city from other provinces and cities.

The only reason is that your mobile phone can receive signals from other provinces. You are at the border of two provinces. This also exists between regions. A place between two regions. Your mobile phone can receive text messages from another region.

Now is the information age. Every time you go to a region or province, there will be a mobile phone text message reminder. Reminds you that you have arrived in another area.