https://phys.org/news/2018-10-china-world-billionaires-richer.html

But Chinese billionaires expanded their wealth at nearly double that pace, growing by 39 percent to $1.12 trillion.

"Over the last decade, Chinese billionaires have created some of the world's largest and most successful companies, raised living standards," said Josef Stadler, head of Ultra High Net Worth at UBS Global Wealth Management.