The US government accuses China of stealing American intellectual property and forcing US firms to handover valuable tech. But US President Donald Trump has also repeatedly complained about his country's $375 billion deficit in the trade of goods with China.
Ma argued on Monday that the purpose of trade should be to promote peace and communication rather than conflict and that the rise of protectionism is misguided. "Nobody can stop the free trade," he said.
His remarks at the event came hours after Chinese President Xi Jinping slammed a "winner-takes-all" approach to international trade. The China International Import Expo has been organised by the Chinese government to promote the country as a market for imports from other countries.