What is a rising constellation?

Interpretation of rising constellation:

In western astrology, the rising constellation is also called the birth star. It is the constellation where the eastern horizon is when a person is born.

The following explanation is taken from Baidu Encyclopedia-the meaning of Rising Constellation:

The rising constellation changes according to the time and place of birth. The rising constellation of personal astrolabe is "Asc".

Its concept originated in the middle ages, because at that time a new element was born, that is, the division of heaven and earth.

That is, according to the time and place of birth, the location of birthdates is divided, which makes birthdates personalized and improves the prediction accuracy.