1. Determine the scope of the topic: First, define the main content and research scope of the paper. For example, you can choose "natural elements in landscape paintings in western Guangdong" or "humanistic characteristics in landscape paintings in western Guangdong".
2. Research purpose and method: Considering the research purpose and method of this paper will help to determine a specific angle. For example, "artistic expression techniques in landscape paintings in western Guangdong" or "historical inheritance in landscape paintings in western Guangdong".
3. Highlight uniqueness and contribution: Thinking about the uniqueness and contribution of your paper in this field will help attract readers' interest. For example, "the study of local culture of landscape painting in western Guangdong" or "the practical significance of landscape painting in western Guangdong".
4. Combining keywords and concepts: According to the main content of the paper, combine related keywords and concepts to start the topic. This will help to highlight your research focus. For example, "Tradition and Contemporary in Western Guangdong Landscape Sketch" or "Western Guangdong Landscape Sketch and Cultural Heritage Protection".
5. Word collocation and language style: Choose simple and clear word collocation and language style to express the topic clearly and attract readers. For example, "the artistic expression of landscape painting in western Guangdong: the contrast between tradition and modernity" or "excavating the cultural treasures in landscape painting in western Guangdong".
Please note that the above are just some suggestions to stimulate the thinking of the topic, and the choice of specific topics should be determined according to your research content and personal preferences. I hope it helps you!