问答题 The recent string of scandals at Chinese companies listed in North America should be a wake-up call for both the listing authorities and investors．Their failure to Pay sumcient attention to corporate governance and accounting is stoking a confidence crisis． The listing rules should be tightened．Foreign companies that cannot comply with US Standards of accountlng should not raise money from American investors．There is，sadly，little to be done about those comPanies that have already been admitted as to delist would simply punish investors further．