Who wrote the lyrics of "Paula Tsui in jubilation"?

Paula Tsui, Zheng Guojiang.

According to Baidu Encyclopedia, Happy is a song sung by Paula Tsui, a famous singer of the older generation. This song is included in the album In the Night Wind released by 1979. Music: Paula Tsui, Zheng Guojiang, Itsuwa Mayumi; Arranged by Paula Tsui and Zheng Guojiang; Lyrics: Paula Tsui, Zheng Guojiang.