Hello , 8520388 2 .   Hi , this is Maria . Is that Shirley ?   Hi , Maria , this is Shirley .   Shirley , do you know today's homework from our economic law class ? I have written it on a piece of paper but I can't find it now .   Hold on for a moment please . I'm fetching my textbook .   OK .   Oh , the homework is to explain what economic law is both in broad sense and in narrow sense .   Explain the economic law ? An essay question again ?   Yes . You can use your textbook for your reference .   Are there any clear answers in the book to this question ?   I don't think so , Maria , but I think you can look for information on the Internet .   OK , thank you , Shirley . You are very helpful . I have another question . When does the Economic Law of China come into effect ? 