aka Choi Yun-jeong & Seo Jeong-gun
Chronology of achievements
- Joined: July 1997
- Platinum: October 1998
- Ruby: June 1999
- Sapphire: February 2000
- Emerald: April 2000
- Diamond: March 2001
- Executive Diamond: August 2002
- Founders Executive Diamond: August 2002
- Double Diamond: August 2002
- Founders Double Diamond: August 2003
- Triple Diamond: August 2004
- Founders Triple Diamond: August 2008
- Crown: August 2009
- Founders Crown: August 2011
- Crown Ambassador: August 2012
- Founders Crown Ambassador: 2013
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