"China has very good relations with Iran," he said, noting that China is helping Iran develop its oilfields.
In January, Iran and China signed a $1.76 billion contract for the initial development of the North Azadegan oil field in western Iran.
The agreement between China National Petroleum Corp (CNPC) and the National Iranian Oil Co (NIOC) foresees production from the field reaching 75,000 barrels a day in four years' time.
In March, Iran's state-owned gas company, Iran LNG, and a Chinese consortium signed a 3.39 billion dollar deal to produce liquefied natural gas in the Islamic republic's South Pars field.
"Iran does not have a lot of refineries. They produce crude but they have to import gasoline. Their refinery is not good," Chu said.
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