感謝雲兒，答案拿到了！！新舊護照一起帶著就可以，你真好，給我了靈感！！真的要抱住親十個！！！見內。俺下線啦

An expired US passport with a valid Chinese visa is good for travelling to China provided it is used together with a new valid US passport bearing the same name, sex, date of birth and nationality. If any changes are made to the above mentioned information on the new passport, a new visa shall be applied.