I am sympathetic to the idea that China would never bother to peg the price of gold. Pegging implies that you would be willing to both buy and sell it to keep it at a certain level. I don’t believe that China has any interest in selling even the tiniest little bit of their gold reserves to keep it at a certain price.
But I do believe the Chinese are managing the price of gold priced in CNY. They have in essence provided a floor at which they are willing to accumulate gold. They don’t bother selling it when it rises above that level, but when the gold price descends into their buy zone, they are there with stacks of blues.
So why is the price of gold going down recently? Well, if we assume that China is one of the biggest buyers of gold, when their currency depreciates, their bid for gold priced in US dollars falls.
The price of gold has not been pegged in CNY, it is merely being bought in that currency. The Chinese have fundamentally changed the way they look at gold. Instead of pricing it in US dollars, they are pricing it in CNY. And they are bid. For size.
https://www.zerohedge.com/news/2018-08-07/gold-have-chinese-changed-way-they-look-it