·paper · porcelain · printing press · navigational compass all of these technological advances originated in

The answer is: China.

The first system to produce paper was recorded in China during the Han dynasty (25-220 CE), while Mechanical woodstock printing began at the time of the Tang dynasty in about 220. Besides, porcelain also developed at a slow pace in China around 2,000 years ago, and the compass was invented throughout the Han dynasty, in about 206 BC, but was later used as a nativation device in the eleventh century, amid the Song dynasty.

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.