In China, individuals can complain to higher authorities about corrupt government processes or officials through the petition system. The form of extrajudicial action, also known as "Letters and Visits" (from the Chinese xinfang and shangfang), dates back to the imperial era. If people believe that a judicial case was concluded not in accordance with law or that local government officials illegally violated his rights, they can bring it to authorities in a more elevated level of government for hearing, re-decide it and punish the lower level authorities. Every level and office in the Chinese government has a bureau of “Letters and Visits.” What sets China’s petitioning system apart is that it is a formal procedure—and as Zhao Liang's documentary shows, the system is largely a failure. A residential area near Beijing South Railway Station was once home to tens of thousands of residents from all over the country. Known as “Petition Village,” its bungalows and shacks were demolished by authorities several times, but many petitioners still clung to the land in search of a clear future. _Beijing Petition Village_ portrays the village in the midst of this upheaval, focusing on the thousands of civilians who travel from the provinces to lodge their complaints in person with the highest petitioning body, the State Bureau of Letters and Visits Calls in the province, only to repeatedly get the brush-off by state officials. Ultimately, in 2007, Petition Village was demolished for good. The film went on to win the Halekulani Golden Orchid Award for Best Documentary Film at the 29th Hawaii International Film Festival, and a Humanitarian Award for Documentaries at the 34th Hong Kong Film Awards.

The domestically-released version of "Petition" consists of three parts: “The Masses,” “Mother and Daughter” and “Beijing South Railway Station.” Part one, “The Masses,” brings together the stories of petitioners of various backgrounds, who all for different reasons, ended up walking the same path. “The Masses” gives a comprehensive account of what is petitioning and and follows the process. Part two, "Mother and Daughter," follows the story of Huaying, who brought her daughter Xiaojuan alongside her from the countryside of Jiangsu to Beijing to petition when Xiaojuan was only four years old. Over the next twelve years, they lived a wandering life. "Mother and Daughter" spans the longest period among all the parts of Petition, from 1996 to 2008. It witnesses the growth of Xiaojuan over ten years of petitioning, not only describing the sorrow of Chinese petitioners, but also revealing how long-lasting petitions cases affect the fate of the next generation. In official reports, petitioners lack a voice and appear to be even more marginalized under the media’s tactics. It also raises the issue of forced psychiatric confinement of individuals the Chinese government deems difficult. “Beijing South Railway Station" surveys the "petitioner village," a residential area near the station that was once home to tens of thousands of people from all over the country. It was eventually demolished by authorities in preparation for the 2008 Olympics. The film captures bungalows being knocked down, shacks being flattened, and security police chasing after residents, the latter not given the time to grab any necessities. Zhao Liang recalls dressing like the interceptors when filming interceptors, and dressing like a petitioner while filming petitioners. “I had several outfits, and tried to stay low key, using the smallest cameras possible.” The film went on to win the Halekulani Golden Orchid Award for Best Documentary Film at the 29th Hawaii International Film Festival, and a Humanitarian Award for Documentaries at the 34th Hong Kong Film Awards.

South side Street near Tiananmen Square in Beijing has long been a gathering place for some homeless people as well as petitioners. The director became involved in the homeless relief charity in 2007, and continued to follow the film, which the director finished editing eight years later. The film was selected for the 12th China Independent Film Festival Documentary Competition.

This film follows the stories of environmental activist Tan Zuoren and artist Ai Weiwei. In July 2009, Tan Zuoren was charged with the crime of “Inciting subversion of state power,” and his trial was held in Chengdu, Sichuan Province. Ai Weiwei was invited by Tan’s lawyer to testify in court, but the night before the trial, he was assaulted by the police and detained in a hotel. To everyone’s surprise, Ai turned on the tape recorder before the police entered his residence and managed to record the incident. Later, Ai and his colleagues released a documentary about this incident, titled “Disturbing the Peace” (or “Laoma Tihua”). This film interviews the people behind the scenes of “Disturbing the Peace,” including the director, photographers, editors, and audiences of the film, who discuss the relationship between citizens and government authority. This series of films are in Chinese with Chinese subtitles.

The year 2003 was known as the birth of the Weiquan—the rights defense–movement, which was marked by the Sun Zhigang incident in Guangzhou. At the same time, a campaign began to get justice for Huang Jing, a teacher from Hunan who was sexually assaulted and killed by her boyfriend. The campaign involved the victim’s family, netizens, feminist scholars and activists, and lasted for several years. This documentary records the process of Huang Jing’s case from filing to post-judgement, and analyzes the broader issue of sexual violence against women in China. The films in this series are in Chinese with Chinese subtitles.