据理财周报零售银行实验室研究员监测，四大行目前均大量发行了高端的白金信用卡，
O B-company I-company I-company I-company I-company I-company I-company I-company O O O B-position I-position I-position O O O O O O O O O O O O O O O O O O O O O O O