BẠC ĐẠN-VÒNG BI-6900-6901-6902-6903-6904-6905-6906-6907-6908-6909-6910-6911-6912-6913-6914-6915-6916-6917-6918-6919-6920-6921-6922-6923-6924-6925-6926-6927-6928-6929-6930-Z-ZZ-2ZR-2Z-DDU-LLU-RS-2RS-C3