Question: What is the stage name for actor who co-stared the 2016 film "Train to Busan" with Jung Yu-mi and Ma Dong-seok?
Context: My Dear Desperado (; lit.  My Gangster Lover) is a 2010 South Korean romantic comedy film written and directed by Kim Kwang-sik, and starring Park Joong-hoon and Jung Yu-mi as two people who become semi-basement one-room neighbors: brave yet jobless Se-jin and Dong-chul, the neighborhood gangster who always gets beaten up.  The film received 688,832 admissions nationwide.  This film was remade in Hindi titled "Jayantabhai Ki Luv Story" in 2013 starring Vivek Oberoi opposite Neha Sharma in lead roles.  The movie was officially remade in Tamil by Nalan Kumarasamy titled "Kadhalum Kadandhu Pogum" for which () or ₩71,587,640.57 was paid as copyrights. Cafe Noir () is a 2009 South Korean romance melodrama film starring Shin Ha-kyun, Moon Jeong-hee, Kim Hye-na and Jung Yu-mi.  Written and directed by first-time director Jung Sung-il, a well regarded film critic-turned-director, it is a contemplation on love and heartbreak largely based on two works of literature - Johann Wolfgang von Goethe's "The Sorrows of Young Werther" and Fyodor Dostoyevsky's White Nights.  The critically acclaimed work debuted at the 66th Venice Film Festival in 2009, and Jung was nominated for New Talent Grand Pix at the 2010 Copenhagen International Film Festival. Train to Busan () is a 2016 South Korean zombie apocalypse action thriller film directed by Yeon Sang-ho and starring Gong Yoo, Jung Yu-mi, and Ma Dong-seok.  The film takes place on a train to Busan, as a zombie apocalypse suddenly breaks in the country and compromises the safety of the passengers. Psychokinesis is an upcoming South Korean black comedy film directed by Yeon Sang-ho.  The film stars Ryu Seung-ryong, Shim Eun-kyung, Park Jung-min, Kim Min-jae and Jung Yu-mi. Ma Dong-seok (born Lee Dong-seok on March 1, 1971), also known as Don Lee, is an American actor based in South Korea.  He is best known for his supporting roles in "The Neighbor", "", "The Unjust", and "Train to Busan".  He also played leading roles in "Norigae", "Murderer" and "One on One. The Crucible (; also known as Silenced) is a 2011 South Korean drama film  based on the novel of the same name by Gong Ji-young, starring Gong Yoo and Jung Yu-mi.  It is based on actual events that took place at Gwangju Inhwa School for the hearing-impaired, where young deaf students were the victims of repeated sexual assaults by faculty members over a period of five years in the early 2000s. Gong Ji-chul (; born July 10, 1979), better known by his stage name Gong Yoo (), is a South Korean actor.  He is best known for his roles in television dramas "The 1st Shop of Coffee Prince" (2007) and "" (2016-2017), and the films "Silenced" (2011), "The Age of Shadows" (2016), and "Train to Busan" (2016). Jung Yu-mi (born January 18, 1983) is a South Korean actress.  Jung made her feature film debut in "Blossom Again" (2005), for which she received acting recognition.  She has since starred in the critically acclaimed films "Family Ties" (2006), "Chaw" (2009), "My Dear Desperado" (2010), and the box office hits "The Crucible" (2011) and "Train to Busan" (2016).  She also frequently appears in films by auteur Hong Sang-soo, notably "Oki's Movie" (2010) and "Our Sunhi" (2013). Come, Closer () is a 2010 South Korean indie romance melodrama film.  A directorial debut by Kim Jong-kwan and starring Yoon Kye-sang, Jung Yu-mi, Yoon Hee-seok and Yozoh, the full-length omnibus tells the love story of five couples.  It made its debut at the 15th Busan International Film Festival in 2010. The Table is a 2016 South Korean drama film written and directed by Kim Jong-kwan.  It stars Jung Yu-mi, Han Ye-ri, Jung Eun-chae and Im Soo-jung.
Answer: Gong Yoo