Why were artists in the PRC advised to observe people and experience a variety of social classes?

For 15 points. somebody once told me the world was gonna roll me. the next line is?

What is the best economic system socialism or capitalism

Silverpoint is a. a technique using the blackish residue of impure carbon obtained by removing water from animal and vegetation substances. b. a technique involving the use of a metal point, and a thin silver wire, popular in the 14th and 15th centuries. c. a printmaking technique born from crayon manner that imitates the appearance of chalk lines. d. a technique used since the 16th century involving a stick filled with either colored or black graphite, a heated mixture of carbon and clay