Chinese officials are understandably angry about the irresponsible brinkmanship demonstrated by their American counterparts in recent weeks. Unfortunately, anger counts for little in international finance. The danger facing the US is that after Tuesday’s debt deal any sense of urgency over a dire fiscal situation will dissipate. The danger for China is that it does not learn the right lesson – namely, that now is the time to end its dependency on the US dollar.

China is worried about the possibility of a US default for obvious reasons. As the largest foreign holder of US Treasuries, either a default or a downgrade would bring huge losses. Even after this week’s debt deal, however, the risk remains that US debt will continue to grow to the point where its government is left with no option but to inflate the burden away. While there is little China can do about its existing Treasury holdings, it can rethink past policies – and ask both how it fell into this trap, and how it might free itself.

China has run a current account surplus and a capital account surplus almost uninterruptedly for more than two decades. Inevitably this has led to an accumulation of foreign reserves. It is clear, however, that running these surpluses persistently is not in China’s best interests. A developing country, with per capita income ranking below the 100th in the world, lending to the world’s richest country for decades is not reasonable. Even worse is the fact that, as one of the largest foreign direct investment-absorbing countries in the world, China essentially lends money it borrowed at a high cost back to its creditors, by buying US Treasuries, rather than importing goods and services.