The unique feature of his film is the actors - they are not professional but celebrities on micro-blogs. Among micro-bloggers in the cast are publisher Zhang Lixian, folk singer Zhou Yunpeng and screenwriter Shi Hang. The film is based on the true story of a Beijing plainclothes policeman named Zhang Huiling, who has been working for more than 10 years in Shuangyushu, a community of Haidian District, Beijing. It depicts the stories of ordinary Chinese people struggling in the metropolis..