"Salty superman" is a common name for "Altman" in Hong Kong and Macao. In fact, the official translation is "Superman", but it should be distinguished from the "Superman in underwear" in the workshop for the same reason as the explanation on the first floor.
In addition, translators in Taiwan Province Province are "super manpower overlords".
This relationship is as follows:
Altman (China) = Superman (Hong Kong and Macao, known as "Salted Egg Superman") = Super Human Overlord (Taiwan Province Province)