Having Oracle database OCM certification, middleware Weblogic certification, Linux RHCE certification, AIX small machine certification, backup NBU certification, with over 10 years of experience in Oracle database and middleware work. Having solid knowledge of database and middleware theory, familiar with various operating system management, and rich experience in database management and operation, serving clients in multiple industries including power, taxation, operators, transportation, public security, healthcare, finance, government, ports, universities, etc. Have a profound understanding of database technology, familiar with data backup and recovery, disaster recovery, skilled in database migration and upgrade, fault diagnosis, performance optimization, proficient in database RAC and DG architecture, and have rich practical experience.