You （ Liu Dan ） are a student from School of English and International Studies. You were impressed by the students’ performance of Shakespeare’s play King Lear （《李尔王》） at University of International Business and Economics and want to know more about drama. Write a letter to Prof. Sun of the University to invite her to offer a lecture on Drama to your classmates. Prof. Sun, with profound knowledge of this subject, has rich experience in arousing students’ interest in drama by encouraging them to put on plays on campus. You will ask Prof. Sun to decide the date to make the trip to your school. （150-200 words）