You can study several terms that WTO has a great influence on China, and then make an empirical study on an economic model with empirical economic data, for example, the verification of Heckschel-Olin model under WTO conditions and so on.

The advantage of empirical paper is that although the process is tiring, it is basically to find information and do manual work, and there will be nothing to discuss in depth; Although the normative document looks easy, it needs deep thinking and may not be easy to pass in the defense.