Business administration, also known as industrial and commercial enterprise management, is the content of enterprise management, including the content can refer to the curriculum of MBA, such as the curriculum of the National People's Congress:

compulsory course

Socialist Economic Theory/English/Management Economics/Data Modeling and Decision-making/Financial Accounting/Corporate Finance/Organizational Behavior/Marketing/Operation Management/Management Information System/Enterprise Strategic Management/Commercial Law

Selective course

Enterprise organization theory/entrepreneurship and entrepreneurship management/human resource management/knowledge management/cross-cultural management/advertising and corporate image/promotion management/brand strategy/e-commerce/retail marketing/international operation and management/international finance/international trade/financial analysis and decision-making/capital market/venture capital/technical analysis of securities investment/taxation and business strategy/financial tools/information resource management/supply chain management/network accounting.

If conditions permit, you'd better go to school for further study. You don't have to get a degree, but taking an advanced course is not bad. You not only learned knowledge, but also made some new friends.