They don't pay the interest on the bonds, they get paid the interest. They hold the bonds, they didn't sell the bonds.
Now this is where it gets interesting. We don't know what the exact arrangements are. I believe that the cacasus group gave them the bond. Now, I also think that CSHD and the Cacasus group will split the interest. On this bond $550 million split 2 ways) Then CSHD will use the bond as leverage to borrow cash and fund their various projects. Looking at the future projects on the Songwi site theere are some major major projects at hand.