celebrities. Giddens chose first-time actor Ko Chen-tung because he felt he showed great improvement in his acting skills in each successive audition. Giddens liked his attitude, having seen Ko Chen-tung hiding in a corner, frantically studying the script just before his audition. The director chose Ao-chuan, Yen Sheng-yu, Hao Shao-wen, and Tsai Chang-hsien to play the roles of his high school friends. He described Hao Shao-wen as being a persuasive speaker, Tsai Chang-hsien as being a very good prankster, and Ao-chuan as self-confident. Hu Chia-wei played herself as a teenager. Giddens describes the two of them as "the Jay Chou and Jolin Tsai of the [Chinese] publishing world". Giddens' mother told him that she would like either Lotus Wang or Phoebe Huang to play her in the film. In the end, Giddens settled on Lotus Wang, because she did not have any other work commitments at that time. Ko Chen-tung's real father plays the father in the film. Filming You Are the Apple of My Eye was primarily filmed at Ching Cheng High School (精誠中學), the school Giddens and Shen Chia-yi attended. The director said he chose the school because "he wanted so badly to see Ko Chen-tung and Michelle Chen in the school uniform that he remembered vividly". The filming of the school scenes could only be done during the Taiwanese school holidays. Because the main location was at the school, it was decided to film the remainder of the film on location throughout Changhua County. The filming had a reported budget of NT$50 million (approx. US$1.67M in January 2012). Theme song "Childish" (孩子氣), a song from the film, was written and sung by Michelle Chen. Giddens was so touched by the song that he shed tears "on the spot" after first hearing it; in particular, he liked the song's lyrics. He also praised Michelle's dedication to her role, saying "I believe that the reason that she managed to get inspiration to write this song is because she likes her role [in this film]". Giddens was also involved in some of this film's theme songs, including "Those Years" (那些年). At first Giddens could not decide on the closing theme for this film; however, after hearing one of Japanese composer Mitsutoshi Kimura's new compositions he chose it and added lyrics. "The Lonely Caffeine" (寂寞的咖啡因) had been composed by Giddens for Shen Chia-Yi when the two were in a relationship. He