If you have paid attention to the entertainment industry in South Korea throughout the years, you're probably familiar with the phrase "Yoo Line vs. Kang Line." These two lines refer to two very famous entertainers, Yoo Jae Suk and Kang Ho Dong. The "lines" refer to the celebrities that often star as regulars in their show programs. 

Rookie entertainers try hard to get into these "lines" as it provides opportunities for these stars. Being on one of their shows almost guarantees success, as most of the shows that Kang Ho Dong and Yoo Jae Suk appear on are always successful.

Yoo Jae Suk has "adopted" celebrities to his line through his programs, such as Family Outing, Running Man, Infinity Challenge, and How Do You Play? While Kang Ho Dong was able to adopt people into his lines through programs such as 1 Night 2 Days, Star King, and Journey to the West. Yoo Jae Suk and Kang Ho Dong are both famous for taking extreme care of the people in their "lines," so it's definitely something that celebrities want to be a part of.

Today, we'll be taking a look at some of the notable stars that are in part with these lines and the shows that the stars have participated in.

YOO LINE

Ji Seok Jin (Running Man, Happy Together 3, How Do You Play? - MSG Wannabe Project)

Haha (Running Man, Infinity Challenge, How Do You Play?)

Song Jihyo (Running Man)

Kim Jong Gook (X-Man, Family Outing, Running Man)

Jeon Somin (Running Man, Sixth Sense, Skip)

Jung Junha (Infinity Challenge, How Do You Play?)

Shin Bong Sun (Happy Together 3, How Do You Play?)

Lee Mijoo (Sixth Sense, How Do You Play?)

Jo Seho (Happy Together 3, Yoo Quiz On The Block)

Lee Kwangsoo (Running Man, The Zone: Survival Mission, Korea #1)

Park Myungsoo (Happy Together 3, Infinity Challenge)

Kwanghee (Infinity Challenge, How Do You Play? - SSAK3 Project)

Lee Hyori (Happy Together Friends Family Outing, How Do You Play? - SSAK3 & Refund Sisters Project)

Park Misun (Happy Together 3)

KANG LINE

Lee Soo Keun (1 Night 2 Days, Journey to the West, Knowing Bros)

Eun Ji Won (1 Night 2 Days, Journey to the West)

Kim Jong Min (1 Night 2 Days, Star King)

Shin Dong (Strong Heart, Star King, Knowing Bros)

Kim Young Chul (Strong Heart, Knowing Bros)

Song Mino (New Journey to the West)

Kyuhyun (New Journey to the West)

P.O (New Journey to the West)

Kim Hee Chul (Knowing Bros)

Lee Seung Ki (1 Night 2 Days, Strong Heart)

Lee Teuk (Star King, Strong Heart, Let's Eat Dinner Together)

What are your thoughts on this list? If you've watched a show with Yoo Jae Suk or Kang Ho Dong, you're bound to have seen at least one of these superstars. As you can see, many of the stars appear in multiple programs and truly establish this "line" relationship, and it's something any rising entertainer desires. What line would you like to be a part of? Is there any star in these lines that we may have missed? Make sure to let us know in the comments below!