Why does the weather always change from west to east?

Here's a piece of information to look at:

/wxyt_new.asp

Because most of China's land is in the middle and high latitudes, the direction of upper air flow in this area basically moves from west to east, so we watch satellite cloud pictures every day, especially in winter and spring, and the cloud system generally moves from west to east. When watching, we can according to the local geographical location, cloud coverage and movement. In the summer weather system, due to the influence of subtropical high system, especially in typhoon season, the typhoon cloud system activities move from east to west.

in short, the weather changes always originate from the west to the east of the middle and high latitude weather system, and the fundamental reason is that the rotation direction of the earth is from west to east.