A little bit side talk..... Regarding USD value, the book
"China Marine: An Infantryman's Life after WWII" offered a vivid example. In 1945-1946, riding a rickshaw in Beiping cost USD 3 cents. Sixty years later, I visited the same city (now called Beijing), the charge converted to USD was 60 cents. Same service, same city, pure labor work reflects inflation better, because new technology does not help anything here.