The biggest workforce in the world has undergone an extraordinary transformation. China’s farm labourers and industrial proletariat have been joined by an army of gig workers. Tens of millions now use tech platforms to find jobs for fleeting periods; fully 200m, or 40% of the urban labour force, depend on some kind of flexible work. The fortunes of these precarious workers, many of whom struggle to buy property and gain access to public services and benefits, will shape China’s economy and socie...