Some US manufacturers may encounter difficulties if they plan to take their operations back to their home country, Terry Gou, CEO and chairman of Foxconn Technology Group, the world's largest contract consumer electronics maker, warned on Monday

He made the comments against the backdrop of US President Donald Trump's call for US businesses to move jobs back to the United States.

For example, shoemaking companies may find they can't even find the right people to make molds, he said.