By Brenda Goh BEIJING (Reuters) -Chinese President Xi Jinping used a visit to Shanghai on Tuesday to push for breakthroughs in artificial intelligence and underscore China’s leading role in the "Global South".

China is reportedly conducting a global diplomatic campaign to oppose President Donald Trump’s new trade deals with US allies. According to a Bloomberg report on Tuesday, Beijing is trying to reframe itself as a global rules-based order defender and make other countries see Washington as an unreliable trading partner.

Chinese leader Xi Jinping has not spoken to US President Donald Trump on the phone recently, Beijing said Monday, reiterating that no talks are taking place between the two countries to resolve their tariff war.