The us. Treasury department is warning banks and financial institutions to be on alert for russian attempts to evade sanctions. But sanctions con actually boost bajing's own ambitions for its currency. As our asia financial correspondent, tabby kinder explains, china wants the renmanb to be more of a global currency. We might see moscow use its foreign reserves in china to finance imports from country. And this is good for the remimbi - but you still need to remember there are many governments who would take payment in rambi.