Mulan singer started her career from the café and had joined in several bands such as Swara Coustic, Bandung and Dimensions All Star Band. In early 2005, together with Maia Ahmad Mulan joined the duo released an album titled The Queen and the Queen & Friends. The first single titled "Friends But Mesra" a huge success and catapulted the name of Mulan Kwok instantly become one of the top vocalists. Numerous awards were achieved. The album sold more than 400,000 copies and has confirmed the Queen became the most successful female group at that time. Year 2006,a album titled No. One is re-birth hits titled "Alligator Man Army" and "Dear Diary". The album also successfully sold up to 500,000 copies in first week of release. But later, on January 31, 2007 Mulan announced the departure of the Queen due to problems of financial transparency in the management body of the Queen.
In the compilation The Best Of Love Artists Republic Vol. 1, Mulan collaborate with Lani vocal group on a single titled "Sick Not Play" which launched in August 2008.
Mulan gait in art began when starring role FTV "Prima Donna Search for Paradise" in 2006, along with Darius Sinathrya, Indra Birowo and Aming. In the year 2007, Mulan starring in a soap opera titled "Couples Heboh" along Baim Wong. Some even followed Mulan FTV titles in the same year. While on the big screen, starring in a film entitled Mulan "Sorry I knocked your wife" along Ringgo Agus Rahman. For his first film, Mulan has been nominated at MTV Indonesia Movie Awards 2007 in the breakthrough category Actor / Actress.