Acme, Inc., a multinational company based in the United States, has a large subsidiary located in Beijing, China. Acme is audited by an international accounting firm headquartered in the United States; its subsidiary is audited by the Chinese affiliate of that firm. Under U.S. auditing standards, what responsibilities, if any, does Acme's U.S. audit firm have to supervise or oversee the audit of the Chinese subsidiary? Would these responsibilities be different under International Standards of Auditing?