4 Aug 2017 PBOC drains net CNY 40 bn via OMOs this week PBOC drains a net CNY 40 bn via Open Market Operations (OMOs) this week versus a net injection of CNY 280 bn seen last week. Meanwhile, the Central bank injected CNY 90 bn via 7 day reverse repos and CNY 30 bn via 14-day reverse repos today.