Usually the Legislative makes the laws. However, if the time is crucial, the President does have a way to make his own laws. However this was limited after the Vietnam war debacle
His mission brought the Chinese into contact with the outposts of Hellenistic culture established by Alexander the Great, opened the way for exchanges of envoys between these Central Asian states and the Han, and led to the introduction into China of a superior breed of horses and new plants, such as grapes and alfalfa ...