EO2 was a Cantopop former dance group in Hong Kong. The name comes from its 4 members with 2 beginning with "E", and 2 beginning with "O". The members are Eric Tse (謝凱榮), Eddie Pang (彭懷安), Osman Hung (洪智傑) and Otto Wong (王志安).Hung starred in a Hong Kong movie called Permanent Residence in 2009, where he appeared as 'Windson', one of the two main characters.