Gigi Wang Lung-hay (Chinese: 王爖熹, [wɔŋ˩ lʊŋ˩ hej˥]; born 9 April 2005), commonly known as her stage name Gigi Yim Ming-hay (Chinese: 炎明熹, [jim˩ mɪŋ˩ hej˥]), is a Hong Kong singer and actress, and a member of the Hong Kong girl group After Class.

Yim made her solo debut in September 2021 with the single "Noble Truth" (真話的清高).

Yim was born Wang Kai-yan, later changed to Wong Lung-hay,[1] in Hong Kong on 9 April 2005, being the eldest of three siblings.

[7] In November, Yim, along with Chantel Yiu, Windy Zhan and Yumi Chung, formed a girl group called "After Class", with their debut single "Present For Future [zh]" (要為今日回憶).

[12][13][14][15][16] She also participated in the reality singing competition Infinity and Beyond  [zh] (声生不息; 聲生不息) organised by TVB and Hunan Television.