They're not household names, but global supply chains depend on them. 

At the 140th Canton Fair, CGTN reporter He Jingyi joins Johann Anton Klimmer, managing director of the Rothenberger Group and a longtime Canton Fair buyer, to explore specialized sectors – from hardware and tools to precision components, general machinery, and lighting and electrical products. 

These specialized SMEs are the backbone of China's manufacturing sector – and help keep global production moving. What can seemingly ordinary products tell us about the strength of a much larger industry?