Looking like a pretty laughable proposal and decision from this side of the pond. Mind you, I am unabashedly pro immigration and pro trade, but the virtual and literal walls some politicians tout in order to gain power or money runs directly against the changes that the world is going through whether it be with or without the Western Establishment.
Ideas, Goods, Services, People, and Capital are increasingly mobile and arbitrary borders prohibit economic growth. Sure, globalization and automation has left some behind, but its advanced the standard of living for so many more people.
The political movements like Brexit are an example of power-grabbing politicians manipulating people into cutting off their arm to spite their hand. More damage will be done and progress unhad than problems will be fixed.
Good luck, Beijing (and be careful what you wish for), the torch is yours and our fate is in your hands, as Washington, Paris, London, Brussels, and increasingly Frankfurt are failing us.