Why did ming china demand that europeans pay for goods with gold or silver?

Ming China (Or the Ming Dynasty from 1368 to 1644 A.C) demanded that Europeans pay for goods (as silk and porcelain) with gold or silver, because the Chinese didn't want any product that the Europeans could offer as exchange, due to that the silks and porcelains the Chinese produced were more valuable than the spices, wool and linen that the Europeans used to produce, and also the Chinese didn't need that products because they used to make them themselves.

ayatollah khomeini can best be described as the leader who declared iran to be an islamic republic.

`stare decisis is a legal doctrine that obligates courts to follow historical cases when making a ruling on a similar current or future case. stare decisis ensures that cases with identical facts be approached in the same way, unless overruled by the same court or a higher court such as the us supreme court. simply put, it binds courts to follow legal precedents set by previous decisions.

stare decisis is a latin term meaning "to stand by that which is decided".