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China's large aircraft family includes the Y-20 large transport aircraft, C919 large passenger aircraft and AG600 large amphibious aircraft.

Over the past 40 years since China adopted the reform and opening-up policy, it has done its fair share of promoting economic openness and free trade, and has made great contributions to the world. It has promised to do more.

Zarif informed the Chinese side of the latest developments on the Iran nuclear issue, and stressed that Iran values China's constructive role in maintaining the Joint Comprehensive Plan of Action.

In 1997, villagers like Xie earned about 500 yuan (73 U.S. dollars) a year on average. Now some 20 years later, he earns nearly 12,000 yuan a year.

"China will continue to keep close communication with relevant parties and play a positive role in achieving the denuclearization of the Korean Peninsula and lasting peace and stability of Northeast Asia," he said.