查看以下一段文字是否有语法问题：Creative Planning: Worked closely with business departments to understand their needs and independently developed content marketing strategies for autonomous driving-related products. Possessed deep knowledge in intelligent connected vehicles, high-precision positioning, and intelligent driving products and applications, effectively showcasing product advantages and uniqueness through the planning and production of materials such as videos, long-form content, posters, and brochures.

该段文字的语法结构基本正确，但存在一些可以改进的地方以提高表达的清晰度和专业性。以下是一些建议：

1. "Creative Planning" 作为标题或小标题，如果需要更正式或具体的描述，可以改为 "Creative Strategy Development" 或 "Strategic Planning for Creative Content"。
2. "Worked closely with" 已经是一个常见的表达，但可以更具体地说明与哪些部门合作，例如 "Collaborated closely with the R&D and marketing departments"。
3. "independently developed" 可以改为 "independently crafted" 或 "designed" 以增加专业性。
4. "Possessed deep knowledge" 可以改为 "Demonstrated expertise" 或 "Held in-depth knowledge" 以提高语言的正式性。
5. "intelligent connected vehicles, high-precision positioning, and intelligent driving products and applications" 可以简化为 "intelligent connected vehicles, high-precision positioning systems, and intelligent driving technologies" 以避免重复并提高流畅性。
6. "effectively showcasing" 可以改为 "effectively highlighted" 或 "effectively communicated" 以增强表达的力度。
7. "planning and production of materials" 可以改为 "strategic planning and production of marketing materials" 以明确工作内容。

综上所述，该段文字的语法没有问题，但通过上述建议可以进一步提升其专业性和清晰度。