Skadden, Arps, Slate, Meagher & Flom has advised Chinese state-owned oil giant Sinopec Group on a $5 billion bond issue.

The company, through a subsidiary, is selling five tranches of dollar-denominated bonds at varying interest rates and maturity dates: $1.25 billion in three-year 1.75 percent notes, $750 million in five-year 2.75 percent notes, $1 billion in 10-year 4.375 percent notes, $1.5 billion in three-year floating-rate notes and $500 million in five-year floating-rate notes.

It is the third major bond sale for Sinopec in the past year, each of which has been among the largest issues in Asia, excluding Japan, in the last decade.

Skadden Beijing partner Peter Huang and Hong Kong partner Edward Lam advised Sinopec on U.S. and Hong Kong law. Haiwen & Partners served as Chinese counsel, while Conyers Dill & Pearman advised on British Virgin Islands law.

Davis Polk & Wardwell Hong Kong partner Eugene Gregor and London partner John Paton advised underwriters Citigroup Global Markets Inc., Hongkong and Shanghai Banking Corp. Ltd., Goldman Sachs (Asia), CCB International Capital Ltd. and J.P. Morgan Securities Plc.