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China is encouraging local authorities in regions with appropriate conditions to set up no-go zones for gasoline cars and use more new energy vehicles for public transport, which analysts and industry insiders say will help boost the industry's development.

China invested a total of 3.6 million in Vietnam in the first quarter of 2017, becoming the third largest foreign direct investor of the country.

China hopes the US and the DPRK will be patient and meet each other halfway to unremittingly advance peace talks and strive for new achievements, Yang said. China will continue to play a constructive role on the issue, he added.

China is the leader among G20 members in terms of the debt relief amount, and this is "an important deliverable for the upcoming G20 Leaders' Summit", the minister said. Reiterating that China will continue to help the world's poorest countries, Liu said the focus would be on tackling debt-related issues and bolstering economic and social recovery.

China is on a fast track in developing value-added fertilizers buoyed by growing demand for efficient fertilizer use and green production in agriculture, experts said.