List positions and companies, indicate working hours, summarize main responsibilities, highlight achievements and mention skills.

1. List positions and companies: briefly write down the positions you have held and the name of the company you worked for.

2. Specify working hours: specify the start and end time of the position. If you are still working, you can write "Up to now".

3. Summarize main responsibilities: describe your main job responsibilities and tasks in this position in one or two sentences, and highlight key responsibilities.

4. Outstanding achievements: emphasize your important achievements in your work, such as performance improvement and project completion, and express them in concise language.

5. Mention skills: briefly list the key skills and specialties related to this position, and highlight your professional ability.