What is Zion?

What is Zion? Why is the word Zionism translated into Chinese as Youtai fuguozhuyi(literally, the restoration of the Jewish ancient country?

Zion is one of the names of the city of Jerusalem, the holiest city in Judaism and the location of the first and second Temples. The Zionist movement is named after it, since Jewish longing for a return to Israel always focused most strongly on a return to Jerusalem itself.

Zionism is translated thus because the Chinese understood (correctly) that Zionism was about restoring the land of Israel as a Jewish country.