As a secondary school student Hoeyyn started to make a living from art. She worked as a Mural Painting Artist, as a Children's Art Teacher and as a Chinese Calligraphy Teacher.

After Hoeyyn graduated from the prestigious “The One Academy” in Kuala Lumpur in 1999 she worked as a commercial Illustrator and Designer. She then returned to The One Academy to teach art. At the same time she founded the art school “Tong Hua”, where she was lecturing as well.

“Art for me is like a diary. Every stroke, every colour is different and brings to life a new chapter. Painting is an ongoing journey that never follows a straight path, a journey which for me became a way of life”. (Hoeyyn Ngu, 2008)

There have been many artistic highlights over Hoeyyn’s life so far. One of which would be taking part in an exhibition for the then Prime Minister of Malaysia Tun Dr. Mahathir Mohamad. Hoeyyn was one of 25 Malaysian artists who were asked to exhibit their best work. With a mixture of pleasure and nerves she painted a wonderful mixed media painting named 'Tun Dr. Mahathir Mohamad, 1988 - Bersatu'.

At this point, Hoeyyn felt she wanted to expand her horizons in art and decided to come to England. Words like ‘crazy’ and ‘mad’ were used to describe the move, but Hoeyyn arrived in London and made ends meet as a caricature artist in the capital’s restaurants and café’s. She went and worked in several jobs to watch people and gain more inspiration for her art.

Hoeyyn would paint in any of her spare time and her work became widely recognised in London. She had three art exhibitions in London, including in upmarket Mayfair.

During her stay in London, Hoeyyn was also involved in a charity auction for which she painted 'Madonna' and 'Tiger Cubs'. The raised funds were donated to the 'Rewilding Project of Save China's Tigers.