At that time, a group of innocent students of Peking University student Cinema Association (SCA for short) organized some times screenings of so-called "underground films" in the campus.

当年，北京大学影视协会一群天真喜欢电影的孩子时常在校园里组织各种在那个时期还被成为是“地下电影”的放映活动。

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It bothers me that even today artists have to go underground to create films and that their work often cannot be shown in China.

CNN: ASIANOW - TIME Asia | Visions of China: Beijing Film Academy

The open-ended selection advertising by and starring Warhol, underground-artist films, anti-Vietnam War protest material, movie trailers, and news events such as the Apollo 11 moon landing emphasizes the mixed motives and techniques of a period that encouraged impurities in art and shunned orthodoxy of any kind.

WSJ: A Dissonant Side of Pop | Dark and Deadpan: Pop in TV and the Movies | Whitney Museum | By Richard B. Woodward

Should the censors legitimise illicitly made digital films by granting them screen permits, or risk driving their creators further underground?

ECONOMIST: Iranian cinema: How not to be offside | The