SHANGHAI — Beijing’s alliance with the World Economic Forum started in 1979 with the arrival in Davos, Switzerland, of a small team of free-market economists led by a wizened Chinese intellectual, Qian Junrui, who had barely survived Mao’s Cultural Revolution. He had been imprisoned for eight years, tortured and repeatedly beaten unconscious.

China and Davos have since become one of the oddest power couples in international economics and politics. The relationship traces the story of China’s ascent after Mao. Chinese leaders have repeatedly chosen the forum for important policy speeches.

Nearly three years after overseeing the Tiananmen crackdown in 1989, then-Premier Li Peng traveled to Davos and urged global business leaders to resume investing in China. Starting in 2007, the country’s premiers began hosting an annual “summer Davos” session in China, with the World Economic Forum, to gather business leaders from across the developing world. And in early 2017, Xi Jinping, China’s current leader, selected Davos for his plea to the world not to embrace trade protectionism and populism.

At this year’s gathering, Chinese officials dealing with a slowing economy and faltering investment are prepared for an energetic promotional message. Their pitch: The signing of an initial trade agreement with the Trump administration last week means China remains a good place for multinationals to keep much of their manufacturing supply chains.