"One market which seemed stubbornly immune to any counterfeiting was that of physical gold in China, which was odd considering that over the past decade China had emerged as the world's biggest counterfeiter of various, mostly industrial metals used to secure bank loans, better known as "ghost collateral", and which adding insult to injury, would frequently be rehypothecated meaning often several banks would have claims to the same (fake) asset. All that is about to change with the discovery of what may be one of the biggest gold counterfeiting scandals in recent history. And yes, not only does it involve China, but it emerges from a city that has become synonymous for all that is scandalous about China: Wuhan itself."

https://www.zerohedge.com/markets/83-tons-fake-gold-bars-gold-market-rocked-massive-china-counterfeiting-scandal