1. manufacturing enterprises: these enterprises produce and sell various products, such as home appliances, auto parts, clothing, food, etc. The analysis of profitability can consider factors such as production cost, sales volume, market share and competitive advantage.

2. Retail enterprises: These enterprises operate various retail businesses, such as supermarkets, convenience stores and clothing stores. Profitability analysis can consider sales, gross profit margin, inventory turnover rate, customer satisfaction and other factors.

3. Service enterprises: These enterprises provide various services, such as catering, tourism, hotels, etc. Profitability analysis can consider the number of customers, average consumption, profit rate, competitive advantage and other factors.