Question: Who was the director of the 2010 Hong Kong biographical martial arts film in which Ashton Chen played the role of a martial arts student?

Ip Man 2 (also known as Ip Man 2: Legend of the Grandmaster) is a 2010 Hong Kong biographical martial arts film loosely based on the life of Ip Man, a grandmaster of the martial art Wing Chun.  A sequel to the 2008 film "Ip Man", "Ip Man 2" was directed by Wilson Yip and stars Donnie Yen, who reprises the leading role.  Continuing after the events of the earlier film, the sequel centers on Ip's movements in Hong Kong, which is under British colonial rule.  He attempts to propagate his discipline of Wing Chun, but faces rivalry from other practitioners, including the local master of Hung Ga martial arts. <SEP> Ashton Chen Xiaolong (born 6 January 1988 in Dengfeng, Zhengzhou, Henan), also known by his stage name Shi Xiaolong ("Sik Siu-Lung" in Cantonese), is a Chinese actor and martial artist.  In 2010, Chen played one of Ip Man's students in the martial arts film "Ip Man 2".  He is also credited as Xiaolung, Tommy Sik, Shi Xiao-Lung, Shi Xiao-Long, Shi Shao-Long, Shieh Shiao-Long, Xi Xiao-Long, Sik Siu-Loong, and S. L. Sik on some of his films.  He has been a disciple of Shi Yongxin, the current abbot of Shaolin Temple, since he was two years old.  Originally named "Chen Xiaolong", Chen was given a dharma name—Shi Xiaolong—by the abbot.  He was taught martial arts by his father and Shi Yongxin at a young age.  He gained attention in the entertainment industry after his performance at the International Shaolin Kung Fu Festival in Zhengzhou at the age of four.  He became a child actor in China and achieved great success in films such as the 1994 martial arts comedy "" (新乌龙院).  In 2003, he stopped acting and went to study in the United States.  In 2005, he returned to China and starred as Zhan Zhao in the television series "Young Justice Bao III".  In 2007, he continued his studies in the United States and graduated from high school in 2008 from the prestigious Performing Children's School (PCS) in New York City.  He has continued his acting career in China since then. <SEP> Legend of the Fist: The Return of Chen Zhen is a 2010 Hong Kong martial arts film directed and produced by Andrew Lau, and starring Donnie Yen as Chen Zhen, a role made famous by Bruce Lee in the 1972 film "Fist of Fury".  The film is a sequel to the 1994 film "Fist of Legend", which starred Jet Li as Chen Zhen.  Principal photography for "Legend of the Fist: The Return of Chen Zhen" began in November 2009 and ended in early February 2010; shooting took place in Shanghai, China.  The film was shown out of competition during the opening night of the 67th Venice International Film Festival, and 2010 Toronto International Film Festival.  The film was released in Chinese theatres on 21 September 2010 and two days later in Hong Kong on 23 September 2010. <SEP> The Legend Is Born – Ip Man is a 2010 Hong Kong biographical martial arts film based on the early life of the Wing Chun grandmaster Ip Man, directed by Herman Yau and starring Dennis To in the titular role.  Though not made in collaboration with Wilson Yip's "Ip Man" or "Ip Man 2", "The Legend is Born" features several actors who appeared in Yip's films, including Sammo Hung, Louis Fan, and Chen Zhihui.  The film also features a special appearance by Ip Chun, the son of Ip Man.