反党

On his billy-club:
Chinese: 反黨
Pinyin: Fan dang
English: Anti-Party

Author:
Chinese: 廣州美院紅旗畫兵批陶漫畫繪製
Pinyin: Guangzhou Meiyuan hongqi huabing pi Tao manhua zhihui
English: Cartoon criticizing Tao of the Guangzhou Academy of Fine Arts Red Flag Cartoon Soldiers