双百方针
word C2- refers to 百花運動|百花运动[Bai3 hua1 Yun4 dong4] with its slogan 百花齊放，百家爭鳴|百花齐放，百家争鸣
Its characters
Learn 双百方针 in real texts
With a free account, hover any word in the library for its meaning, hear it read aloud, save words for review timed to your memory, and see how much of each book you already know.