In the sex industry, they can earn significantly more than that while working fewer days.
It tells how a group of patriotic monks at the temple in Nanjing fought against the Japanese invaders, saved over 24,000 refugees and protected the ancient temple during the Nanjing Massacre between December 1937 and January 1938, telling people never forget historical lessons and calling for world peace.
A spa may just be a spa and not a brothel.