This excerpt taken from the SOHU 10-Q filed May 8, 2007.
Terms of Common Area
The use right of the roof of the building attributes to all the owners.
The use right of the metope of the building attributes to all the owners.
The Buyer shall have the right to share all the profits generated from any advertisements by exploiting the building on the basis of the proportion of the purchased area of the
house to the saleable area of the building.
Bet you've never seen portfolio analytics like these.