Why did China keep the process of silk production secret? China used silk to make gunpowder. China made a lot of money from silk. China was making weapons from silk. China wanted to protect the silkworms.

Hello, I Am BrotherEye

Silk is a fabric first produced in Neolithic China from the filaments of the cocoon of the silk worm. It became a staple source of income for small farmers and, as weaving techniques improved, the reputation of Chinese silk spread so that it became highly desired across the empires of the ancient world

Explanation:

Silk Road, also called Silk Route, ancient trade route, linking China with the West, that carried goods and ideas between the two great civilizations of Rome and China. Silk went westward, and wools, gold, and silver went east. China also received Nestorian Christianity and Buddhism (from India) via the Silk Road.

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BrotherEye

the difference is that white collar worker performs skills like worker as a scientist or well blue collars do physical work and they do services like being a cook.