It would be so tempting to qualify Chinese President Xi Jinping landing in Riyadh a week ago, welcomed with royal pomp and circumstance, as Xi of Arabia proclaiming the dawn of the petroyuan era.

But it's more complicated than that. As much as the seismic shift implied by the petroyuan move applies, Chinese diplomacy is way too sophisticated to engage in direct confrontation, especially with a wounded, ferocious Empire. So there's way more going here than meets the (Eurasian) eye.

Xi of Arabia's announcement was a prodigy of finesse: it was packaged as the internationalization of the yuan. From now on, Xi said, China will use the yuan for oil trade, through the Shanghai Petroleum and National Gas Exchange, and invited the Persian Gulf monarchies to get on board. Nearly 80 percent of trade in the global oil market continues to be priced in US dollars.

Ostensibly, Xi of Arabia, and his large Chinese delegation of officials and business leaders, met with the leaders of the Gulf Cooperation Council (GCC) to promote increased trade. Beijing promised to "import crude oil in a consistent manner and in large quantities from the GCC." And the same goes for natural gas.

China has been the largest importer of crude on the planet for five years now – half of it from the Arabian peninsula, and more than a quarter from Saudi Arabia. So it's no wonder that the prelude for Xi of Arabia's lavish welcome in Riyadh was a special op-ed expanding the trading scope, and praising increased strategic/commercial partnerships across the GCC, complete with "5G communications, new energy, space and digital economy."