After Electric Angel, Sit went to Taiwan in order to improve her Mandarin skills. In order to keep her fanbase (Hong Kong artists usually release one to two albums per year to keep up their popularity), Warner released her first compilation, ""F" Best", on 12 June 2007. This album includes 3 new songs with 15 selected songs from her previous albums. The album also includes a DVD containing a short film and some MVs of her songs. In addition, a special edition of "F" Best was sold out in one month.