B：Hi, this is Maria. Is that Shirley?
A：Hi, Maria, this is Shirley.
B：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.
A：Hold on for a moment please. I'm fetching my textbook.
A：Oh, the homework is to explain what economic law is both in broad sense and in narrow sense.
B：Explain the economic law? An essay question again?
A：Yes. You can use your textbook for your reference.
B：Are there any clear answers in the book to this question?
A：I don't think so, Maria, but I think you can look for information on the Internet.
B：OK, thank you, Shirley. You are very helpful. I have another question. When does the Economic Law of China come into effect?
A：Oh, there isn't such a code called economic law. The Economic Law of China is a general concept for several laws.
B：There isn't such a code?
A：Yes, it's a general name for several laws related to economics, like Commercial Law, and Law of Central Bank.
B：Got it. Thank you, Shirley.