The Chinese official arrived in Tehran on Sunday on a two-day visit in a bid to boost multilateral talks on Iranian nuclear issue.
China is Iran's top trade partner, with economic ties expanding in recent years after the withdrawal of Western companies in line with sanctions against the Islamic Republic over its peaceful nuclear program.
Beijing has also significantly increased its presence in Iran's oil and gas sector by signing a series of contracts worth up to 40 billion dollars in the past few years.
China boosted its oil imports from Iran by 30% in 2011 despite the West's pressure on the world's second largest economy to lower economic ties with Iran.
China's crude oil imports from Iran have amounted to 27.76 million metric tons in 2011, Chinese General Administration of Customs announced.
The figure shows that the country traded in nearly 557,000 barrels of oil from Iran on a daily basis last year.
The growth in China's oil imports from Iran came despite the West's efforts to rally support for an oil embargo on Iran.