What is Saturn's return? What does he mean?

Searching for relevant information on the Internet is not an astronomical concept, but an astrological concept. I'm just briefly introducing the astronomical explanation.

Excuse me, landlord, why are the twelve constellations and not other numbers? This is decided by Jupiter. Jupiter's period of revolution is 1 1.86 years, which is the time when it runs once on the celestial sphere. Jupiter is in Taurus 20 13, Gemini 20 14, Cancer 20 15, and so on. Until 2025, Jupiter completed a week's trip and returned to Taurus. This may also be called "Jupiter's return", but we have a common saying, the animal year.

Back to Saturn, China astronomy, there are 28 stars called "Zhou Xing". Needless to say, this is decided by Saturn period of revolution. Saturn is located in Kangsu (east of Virgo) in 20 13, in the Pleiades (Libra) in 20 14, and in the northwest of Scorpio in 20 15 ... It takes 29.5 years to complete a cycle. After this time, Saturn will return to Kangsu, that is, "Saturn returns."

As for the concept of astrology, I won't involve it. I'm afraid I don't understand. But I can probably guess that the landlord is 29 years old, right? Otherwise, how can I ask this concept?