Oracle Query restore Point-in-time data/restore data

SELECT * from MBK.QB_QBBS_XC as of timestamp to_timestamp (' 2016-12-21 15:40:00 ', ' yyyy-mm-dd hh24:mi:ss ')//query restore Point-in-time data
Flashback table Qb_qbbs_xc to timestamp to_timestamp (' 2016-12-21 15:40:00 ', ' yyyy-mm-dd hh24:mi:ss ');//Restore Data
ALTER TABLE QB_QBBS_XC enable row movement;//executes the statement "Run modified timestamp" If the above error is executed

Oracle Query restore Point-in-time data/restore data