1. Spanish studies (pronunciation, vocabulary, affixes, grammar, etc. )

2. Cultural, social, political, economic and religious aspects of Spanish-speaking countries.

3. Special research on political, cultural, economic and trade exchanges and cooperation between China and Spanish-speaking countries.

4. Comparison between China and Spanish-speaking countries.

5. Literary studies in Spanish-speaking countries (schools, writers, works, etc.). )

6. Comparison of literature between China and Spanish-speaking countries.

7. The translation theory and practice of the Western Han Dynasty and Han Xi.

8. Research on the relationship between language and culture.

This is quite comprehensive

But I personally suggest choosing 2, 3 and 5. Other topics are academic and involve professional knowledge of comparative culture. It will be a bit difficult to really start after writing. As an undergraduate thesis, it is good to choose a good beginning and reflect your knowledge level. It is also important to find a suitable tutor!