Because of its location at the top of the global urban hierarchy, what east asian city ranks among the world’s three global cities?

The correct answer to this open question is the following.

Because of its location at the top of the global urban hierarchy, the East Asian city that ranks among the world’s three global cities is Tokyo, Japan.

Tokyo is the capital city of Japan, its most important city, and one of the most important capital cities of East Asia. Its global status began after World War II when it was destroyed by the war effects and then it fastly recovered to be the prominent capital city it is. Some historians called it the "Japanese economic miracle." Japan is a powerful nation that is characterized by is people that are very dedicated to working, have a notorious work ethic, its technology companies, and modern urbanization.

trade regulation is a field of law, often bracketed with antitrust (as in the phrase “antitrust and trade regulation law”), including government regulation of unfair methods of competition and unfair or deceptive business acts or practices. antitrust law is often considered a subset of trade regulation law. franchise and distribution law, consumer protection law, and advertising law are sometimes considered parts of trade regulation law.

in general the theory of economics says that the more open to trade a country is the better   the result for the same country and the whole economies.

in real life countries impose taxes, quotas, etc which is not so good for the economies.

this kind of commercial war between the usa and china is slowing down the growth of the whole world so we can say that it is a draw back of trade regulations. and the free trade agreements are benefits of trade regulations.