 Songs similar to "The Secret of Immortality" (不死之謎 "Bu Si Zhi Mi") and "Superb" (出神入化 "Chu Shen Ru Hua") are leaning toward the pop rock and rap genre, where they displayed their ability to rap and harmonize well.Their much anticipated second album, Two-sided Fahrenheit, was released on January 4, 2008.The new album saw the four employ more advanced harmonizing techniques as well as some progression from bubblegum pop to more mature ballads, such as "Ten Thousand Joys" (一萬個快樂 "Yi Wan Ge Kuai Le").