I‘d like to play a role of investigator，since I love research. I’d love to study whether the drug I am working on is safety when people taking it. This role is very important because investigators should be responsible for the result of clinical trials. This role is also burdensome, since if something goes wrong, for example, patients have some horrible side effects after taking the pills even if the result is positive， the responsibility will goes to investigators. Therefore investigators should be very careful and make a good plan to measure all the side effects the pills might have.