They then started performing together as a team at university campuses. After about a year, they were discovered by, Anthony Wong Yiu Ming, the chairman of the music production company People Mountain People Sea and a renowned singer of the 90's. Lam and Loo was then signed by the company in 2002, and the group was named at17.
The group was invited to Amsterdam and performed as part of the "Hong Kong China Festival" in 2005. From April 2006 to March 2007, they were appointed as MCs for TVB's popular weekly music show Jade Solid Gold and frequently performed live within the show.
Their first mega concert "Sing Sing Sing 2006" took place at AsiaWorld-Expo in 2006.