What does the contour line on the isobaric surface mean, and how to determine its weather and wind direction?

The pressure contour map shows the pressure level, and the weather is generally good in places with high pressure.

The wind direction between the ground and the sky is slightly different. The high-pressure wind turns clockwise, the low-pressure wind turns counterclockwise, and the high-altitude wind blows along the contour line, which is basically parallel. The surface wind blows along the contour line and forms15 (on the ocean)-30 (on the land) with the isobar.