Generally, there are: SQL Server database technology, Oracle database technology, JAVA programming, Windows operating system and network foundation, basic theory of software testing, Linux operating system and network environment, quality management tools, Zen and defect management tools, JIRA and Jmeter, performance testing tools, LR and Selenium, Python-based web interface development and automated testing, mobile APP function testing, mobile APP performance testing, mobile APP automated testing tools, mobile APP black-and-white box testing, hacker penetration testing guide, information collection and social engineering, sql injection vulnerability and database security, website backdoor and backdoor upload technology vulnerability detailed explanation, Web front-end security practice, phishing attack principle and apt, code audit and vulnerability mining code audit experiment, mobile client security, intranet penetration testing, website penetration testing practice, and so on.