In 2012, Pu represented artist Ai Weiwei when his company sued the Beijing tax authority. That same year, he also represented Tang Hui, who had been sent to a labor camp for peacefully petitioning against the sentences given to the people who raped her 11-year-old daughter, and then forced her into prostitution. Tang, who repeatedly petitioned officials in Yongzhou in her daughter's case, was eventually sentenced to 18 months in "re-education through labor" for "seriously disturbing the social order and exerting a negative impact on society." Tang's sentence sparked calls for the abolition of the system of re-education through labor. Pu was one of three lawyers who defended Fang Hong, a dissident blogger who had been sentenced to one year in a labor camp for writing a poem mocking former Chongqing Communist Party chief Bo Xilai. Following Bo's fall from power following a corruption scandal, Fang filed to have his guilty verdict overturned, and sought compensation from the court.