In general, companies and offices place fish tanks for fish farming. They have two functions. The positive effect is to gather gas, that is, to gather vitality, so that you can gather wealth and prosperous wealth. The negative effect is to block the shackles (injury to the invisible), that is, you can use the power of water to block the impoverished gas, and not hurt the invisible. The ancients believed: "The air is scattered by the wind, the boundary water Then stop.