Why is the subtropical high hot?

Let me use the knowledge of high school to say it briefly ~

First of all, equatorial low belongs to thermal low, subtropical high belongs to dynamic high, subtropical low belongs to dynamic low, and polar high belongs to thermal high.

The equatorial depression caused by "thermal depression" makes the air flow rise from the equator to the high altitude and flow to the polar high pressure. Regardless of the friction with the ground, under the action of geostrophic deflection force (the vertical airflow direction in the northern hemisphere is right, while the southern hemisphere is opposite), the final airflow direction is parallel to the latitude around 30 degrees, which hinders the airflow movement and leads to air accumulation, thus forming a dynamic high pressure-subtropical high. Because of the high latitude,