什么是银行的clearance code？

客户需要样品，给了他一个中国银行的私人账号，他的回复是：他去汇款的时候，银行问他要接行的clearance code。请问这是什么号码？邮件如下： however, my posb bank is questioning me the clearance code of recipient bank. kindly let me know by viewing as below and reply me which is yours? the clearing code refers to any of the following. please contact the recipient bank to obtain the clearing code. fedwire routing number austrian bankleitzahl australian bsb code german bankleitzahl canadian payments association payment routing number chips identifier spanish domestic interbanking code hebic (hellenic bank identification code) bank code of hong kong irish national clearing code (nsc) indian financial system code (ifsc) new zealand national clearing code polish national clearing code (knr) portuguese national clearing code russian central bank identification code uk domestic sort code swiss clearing code (bc or sic) south african national clearing code kindly help to reply me by tomorrow so that we can decide the product earlier. thanks for your kind help. regards,