In 1986, Cheng worked on the Happy Paradise memorial album project, which commemorated the Taipei Zoo's move from Yuanshan to Muzha, becoming the first Taiwanese artist to "depict the city's memories in pop music."
1986 年，台北圓山動物園搬遷到木柵現址，鄭華娟首創台灣「以流行音樂書寫城市記憶」之先，參與製作的《快樂天堂》紀念專輯，至今仍為歌迷津津樂道。