Portrait of mao se says t u.n. g. letting americans buy the current sigh is the way for china to expand the yuan as a global force and spread its influence at a time when beijing is under heavy criticism for desraflg the current see by as much as so many say 40%. they are allowing the yuan to rise but at a graduate rate. we think that by allowing customers in one chinese bank in one city in one neighborhood in the u.s. to convert their yuan it s a go slow type of approach. reporter: no word on how many americans are changing in their bengies for maos.