China is building border walls with Vietnam and Myanmar to keep people out, but also in

Border closures have become a key feature of the COVID-19 era, but China's decision to reinforce border walls with its South-East Asian neighbours has stirred up fresh controversy.

Then-US president Donald Trump gained world-wide attention when he announced his plan in 2015 to build a 1,609-kilometre long “beautiful border wall” in an effort to keep Mexican migrants out of the US.

But on the other side of the Pacific, China is working on its own lesser …