Pu is a prominent figure in the Weiquan movement, having advocated for writers and journalists in a number of high-profile cases, including artist Ai Weiwei. 
Pu ni mtu maarufu anayejulikana kwenye harakati za Weiquan, akiwa amewahi kuwatetea waandishi na wanahabari katika kesi kadhaa maarufu, ikiwa ni pamoja na msanii Ai Weiwei.