Agent J
Promotional poster for the film
Directed by	Jeff Chang, Kuang Sheng, Marlboro Lai
Produced by	Chang Chih-fa, Liu Chun-hao
Written by	Jeff Chang, DJ Chen
Starring	Jolin Tsai, Kim Jaewon, Stephen Fung, Carl Ng
Narrated by	Jolin Tsai
Cinematography	Wang Tsan-chin, Chin-hsin, Tiwa Moeithaisong
Edited by	Chen Jung-huang, Chiang Chih-hsin
Production company	Digital Vision
Distributed by	Capitol
Release date	September 14, 2007
Running time	1:10:00
Country	Taiwan
Language	Chinese, Korean, English, Thai
Budget	NT$33 million

Agent J (Chinese: 特務J) is the ninth studio album by Taiwanese singer Jolin Tsai (Chinese: 蔡依林). It was released on September 21, 2007, by Capitol Music Taiwan. It was renamed Love Mission (Chinese: 爱情任务) in mainland China. Tsai's last studio album, Dancing Diva (2006), not only brought her to the top of the charts, but also won her the Golden Melody Best Mandarin Female Singer and Most Popular Female Singer awards. Expectations were naturally high for the new record, and Tsai was upping the ante with eleven new tracks and her first ever music movie. The album is set to be as successful as Dancing Diva, and keep her at the top of the Asian pop lists. The album has sold more than 2.5 million copies in Asia, with more than 200,000 copies sold in Taiwan alone, and became the best-selling album of the year in Taiwan. The eleventh track, "Sun Will Never Set", reached number 1 on the Hit FM Annual Top 100 Singles. The title track, "Agent J", reached number 14 on the chart. The second track, "Bravo Lover", reached number 41 on the chart. The album earned Tsai an MTV Asia Award nomination for Favorite Artist Taiwan.

To further promote the album, Tsai released her debut film under the same title on September 14, 2007. The film is directed by Jeff Chang, Kuang Sheng, and Marlboro Lai and starring Jolin Tsai, Kim Jaewon, Stephen Fung, and Carl Ng, and the total cost of the film is NT$33 million. The film can be divided into three parts. In the first part, Tsai played the role of a girl who traveled with boyfriend named S in Paris. She was taken away by a secret organization and got brainwashed, and was selected as a special agent due to her lithe physique to help the organization to assassinate people. Tsai's boyfriend S stayed in Paris and worked as a private bodyguard in a specialized agency of the witness security protection, and tracked down Agent J who looks like his girlfriend. Tsai's latest mission was to assassinate the bodyguard, and she followed him to a rooftop and shot him. Tsai was confused about the smile the man gave to her when she fired her gun, and she went to his apartment and found the old photos bearing witness to her past. In the second part, Tsai played the role of a girl in prison and was selected by a secret organization to carry out an assassination in exchange for her freedom. Her target, Blue Beard, received intelligence and sent two killers to assassinate her in London. She met a photographer named Lu Hsiao-tung, and fled under the cover of the man. They started a relationship, but one day Tsai found her boyfriend was a special agent sent by Blue Beard. On the night she went to assassinate Blue Beard, Blue Beard shot Lu Hsiao-tung from behind. In the third part, she played an undercover agent who was instructed to save a agent named Vince who approached a gang boss in Bangkok. However, she found Vince was her ex-boyfriend who was supposed to be died a few years ago. One day both of their undercover identities exposed, and they started a gun battle with gang members. Vince took a bullet, and Tsai took Vince back to her apartment to repair his wound. Another day Vince asked Tsai to leave, and decided to assassinate the gang boss alone. Vince successfully assassinate the gang boss, but took a bullet in the chest and was died.

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