Simplify the following text for a Grade 11 native English-speaking person.
Original: However , the status of three of the members is currently unknown , because Han Geng has left SM Entertainment , Kibum is busy with acting activities , and Kangin has enlisted into the South Korean military .
Simplified: As of 2010 , 10 members are active , due to Han Geng 's lawsuit with SM Entertainment , Kangin 's leave of absence for mandatory military service and Kibum 's pursuit of an acting career .