Why did the chinese guard the secret of silk production so carefully?
the process was not perfected and not ready to share with others.

the knowledge would create too much bickering between silk manufacturers.

the silk road would most likely collapse without silk production.

the production generated great wealth for china as long as it was not shared

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tenochtitlan (also spelled tenochtitlán), located on an island near the western shore of lake texcoco in central mexico, was the capital city and religious centre of the aztec civilization. the traditional founding date of the city was 1345 ce and it remained the most important aztec centre until its destruction at the hands of the conquering spanish led by hernán cortés in 1521 ce, which led to the final collapse of the aztec empire.