Born in Hong Kong, Kay began her vocation in art and design at Central Saint Martins (BA Printed Textiles) and Royal College of Art (MA Constructed Textiles) in London.

In collaboration with her brother, theatre director and designer,  Jing Wong, Kay went on to found the fashion-arts label Daydream Nation in 2006. Together, they weaved story and theatre into their collections, bringing magic to Fashion Weeks with their whimsical designs and performances.  

Over 10 years, Daydream Nation sold to 80 shops around the world; dressed international celebrities such as Ke$ha and Juliette Binoche; collaborated with a range of brands including Peter Jensen, Shangri-la, The Old Curiosity Shop and Urban Outfitters; and even caught the eye of Chanel, whom selected pieces from their AW09 collection to inspire Karl Lagerfeld's work.

Kay's work with Daydream Nation was recognised with awards such as Vogue Italia’s ‘Vogue Talent 2010’; Hong Kong’s Ten Outstanding Designers Award 2009, 2011; Perspective/Cierre Italia’s ‘40 under 40’ Design Award, 2009; and White Milan’s ‘Womanswear Inside White Award’, 2008.

Kay adopts a green approach to her styling projects by abstaining from fast fashion, borrowing from designers, and upcycling old garments. She is a columnist for HK01 and MINGShk, writing mainly on topics of sustainability, fashion and lifestyle. Her piece, 'Trash or Treasure', was featured in the Danish 'slow clothing' publication, Less Magazine. 

In order to raise more green awareness, Kay has partnered with organisations such as Green Peace and Friends of the Earth to bring various happenings to Hong Kong, such as the screening of The True Cost documentary and the Save them From the Landfill sale. She was also invited to speak at JCEIA's Sustainable Fashion conference, 2017, where she presented her talk, Confessions of a Fashion Designer.