When the Chinese speak of a "lou(楼)", they refer to any building of two or more storeys with a horizontal main ridge.
In this case it is sometimes translated as a "tower". The Chinese "ge(阁)" is similar to the" lou" in that both are of two or more storeys. But the" ge" has a door and windows only on the front side, with the other three sides all solid walls. And it is usually enclosed by wood balustrades or decorated boards all around. In ancient times, the "ge" was used for the storage of important articles and documents, and also used to house Buddhist statues.
Auspicious & Fengshui Meaning
As the saying goes: mountains represent population while water emblems property. It means that somewhere have a flourishing population is related to mountains, and wealthy is connected with water.
If people want to make more money and enjoy material life, they can value the things that related to water. And the Fengshui articles of water for office have bearing on corporation''s luck in making money as well.