18 Aug 2017 PBOC drains net CNY 110 bn via OMOs this week PBOC drains a net CNY 110 bn via Open Market Operations (OMOs) this week versus a net drainage of CNY 30 bn seen last week. Meanwhile, the Central bank injected CNY 70 bn via 7 day reverse repos and CNY 50 bn via 14-day reverse repos today.