How to turn off the dubbo monitor log

[? ??]

Dear all,
    How to turn off the dubbo monitor log
e.g.
[com.alibaba.dubbo.monitor.dubbo.DubboMonitor] [INFO] -  [DUBBO] Send 
statistics to monitor 
zookeeper://xxx:2181/com.alibaba.dubbo.monitor.MonitorService?anyhost=true&application=simple-monitor&check=false&delay=-1&dubbo=2.6.0&generic=false&interface=com.alibaba.dubbo.monitor.MonitorService&methods=lookup,collect&owner=qm&pid=9669&remote.timestamp=1520089496318&revision=2.6.0&side=provider&timestamp=1520489737506,
 dubbo version: 2.6.0, current host: xxx


Best Regards,
Victor Zeng.