As a senior student, I personally think that the translation of advertisements and public signs is better. You can write advertisements. There are many papers in this field, so you refer to more things than others. Although the topic is good, there are relatively few references, which makes your writing difficult. You can search your keywords in the digital resources of the school library to see how many reference materials there are. Personally, when writing a thesis, undergraduates should first learn how others write, and then write their own. So, read first, then write:) Good luck.