Rozen yogurt has successfully grown its popularity in big cities of the UK. Investigate and compare the London and Beijing market and its potential

this is a full unit worth dissertation. the topic is autonomous. I am not sure with the topic. Here is what I had in mind:
Frozen yogurt is popular in London, in contrast, there is not many retail store in Beijing. I would like to make comparison between London and Beijing frozen yogurt market and find out why.
Please advise any feasible topic relevant to frozen yogurt in London or Beijing.

Here are the criteria enclosed by University:
A project title,
A description of the research question(s) you would like to answer in your project.
A statement about why you are interested in pursuing this project.
A brief discussion of how you intend to answer your projectaYs main questions.
In addition, you will need to submit a 1 page outline of your dissertation. This outline should include a list of chapter, and section headings and a brief discussion of the questions you intend to address in each section. Please be realistic about the achievability of your dissertation proposal and bear in mind the practicalities that will be involved in undertaking your dissertation.