1. Network: You can find a job online to earn extra money through online investigation, writing, translation, design and program development. 2. Tutoring: College students, with certain academic ability and experience, can use their spare time as tutors and provide one-on-one or small class teaching services. 3. Performance: If you are talented in music, drama, dance, comics, etc. You can try to organize cultural performances at school and take the opportunity to earn sideline income. 4. Selling second-hand: By recycling idle items and selling them on second-hand platforms, you can get some extra income. 5. Advertising endorsement: If you have many fans on social media, you can try to accept the advertising cooperation of brands or businesses and earn advertising compensation. 6. Photography: If you have strong interest and skills in photography, you can provide photography services in schools or communities. 7. Small business: opening a small shop, purchasing, booking, etc. You can also earn some sideline income.