Josep Maria Bartomeu Floreta (Barca's president) is a partner and CEO at ADELTE Group which is into designing, manufacturing, supplying and maintaining airports, seaports and road transport operations.
Apparently, ADELTE Group is expanding into China and bidding on projects like the Ocean Flower Island being built by the Evergrande group which also happens to be the parent organisation of—you guessed it—Guangzhou.
There are rumours that Florentino Perez’s ACS Group was also bidding for the project, but with the Paulinho transfer concluded, could be handed over to ADELTE Group and/or associates.
so, effectively a bribe. The fee is a lot - but it's also Paulinho's release clause and Guangzhou don't want to sell as the window has closed there and they can't replace him (and didn't before the deadline), and they are closing in on the league title.
Comparing that side to Real's or even Atleti, it just doesn't seem appropriate for a club of such magnitude. Take Messi and Suarez out they would be struggling. Busquets is the only other genuine world class player, pique loses his head too much these days.