Planned economies attempt to control not only the “commanding heights” of industry, but also the movement of their people. The transformation of China’s economy into the powerhouse it is today came about only after Chinese were allowed to leave subsistence farms for factories and cities.

Two big developments in China in the last few weeks show that the planners’ instinct to channel population flows and the labour force has not disappeared, despite the power of market forces in the world’s largest economy.

Apple’s primary manufacturer Foxconn last week announced it would take “immediate action” to stop students working overtime to produce the iPhone X after a Financial Times investigation revealed the practice in its vast factory in the interior city of Zhengzhou.