Shang means merchants, ie rich merchants.
This is why indians are too stupid to understand this is not a caste system. It's a how much emphasis a pre-modern Chinese dynasty places on each occupation.
Shi= scholar, bureaucrats.
Nong = Farmers.
Gong = Artisans.
Shang = Merchants.
in ancient China, merchants regardless of their wealth are kept at an arms length by the scholar bureaucrats, because they are seen as the source of corruption.
They also do not produce anything, being the middlemen for other people's labor.
Indians are too low IQ, thinking Shang is low class peasants, when they are the riches in the hierarchy.