One pillar of this year’s blistering commodities rally — Chinese demand — may be teetering.

Beijing aced its economic recovery from the pandemic largely via an expansion in credit and a state-aided construction boom that sucked in raw materials from across the planet. Already the world’s biggest consumer, China spent $150 billion on crude oil, iron ore and copper ore alone in the first four months of 2021. Resurgent demand and rising prices mean that’s $36 billion more than the same period last year.

With global commodities rising to record highs, Chinese government officials are trying to temper prices and reduce some of the speculative froth that’s driven markets. Wary of inflating asset bubbles, the People’s Bank of China has also been restricting the flow of money to the economy since last year, albeit gradually to avoid derailing growth. At the same time, funding for infrastructure projects has shown signs of slowing.