I believe it would be Sudan because it seems the closest but I am not sure.
I believe the Espionage Act may be the answer. The act was passed during the United States' affiliation with WWI. It banned any disloyal language toward the U.S. government. The act has been amended several times however, due to the fact that it violated some constitutional rights.
The silk road can promote the cluture communicating and the economic development by linking China and counties all over the world. For exampe, Chinese could go to India to learn the Buddhism and bring it back. And Chinese could also spread Chinese culture to other countries.