At one point when prices were higher and its oil industry less decrepit, Venezuela was sending China 600,000 barriles por día, de acuerdo a Russ Dallen, the chief executive of Caracas Capital Markets, who has done extensive work untangling Venezuela’s opaque finances. He estimated that has brought the balance down to about $20 a $23 mil millones, plus another $3 millones de dólares para $4 billion owed to Russian oil company Rosneft.

https://www.wsj.com/articles/how-venezuela-became-chinas-money-pit-1531663200