Added annual PBOC sources for China payment statistics

PBOC intra-city notes exchange and electronic clearing system. Its business migrated to HVPS and BEPS by December 2020; no separate annual series is disclosed from 2021. Linked to China, with historical validity where applicable and PBOC evidence.

RecordsChinaBulk Electronic Payment SystemChequesChina Foreign Currency Payment SystemChinese yuanCity Commercial Banks Clearing Payment and Clearing SystemCross-Border Interbank Payment SystemHigh Value Payment SystemInternet Banking Payment SystemIntra-city Clearing System (ACH)National Cheque Image Exchange SystemNetsUnion Clearing Platform