hi yueshiqi,
I want to write about the stray cats because in China there is only few animal shelters.
Fine.... but make sure that;
write an essay in which you explain the significance of that issue to yourself, your family, your community, or your generation.
Think about the significance of this issue to you personally or to your family, community or generation... If you have enough reasons to answer this part of the prompt, then you should go ahead and write without listening to the others. What is most important is that you have enough facts, that are strong facts as well, for addressing this prompt :)