Oracle OCP, and project management professional certification. Worked in a third-party maintenance company as a senior DBA, project manager, and department manager. In 2021, the book "The DBA Challenge Guide: Left-handed Oracle, Right-handed MySQL" was published. Nearly 10 years of working experience in the database field, good at fault diagnosis and data migration between heterogeneous databases, especially Oracle GoldenGate, has rich experience in TB level database migration, service objects include large operators, financial institutions, government agencies, medical, etc.