Hong Kong may be treated to a kung fu showdown between an upstart mainland action star and a master of the Ving Tsun style, which Bruce Lee studied. Actor Jacky Wu Jing, who angered the school with comments seen as disrespectful to grandmaster Ip Man, has been challenged to fight either Dennis To Yu-hang or Vivi Lee Man-wai, a woman. Eight Ving Tsun institutes will donate HK$500,000 for Sichuan earthquake relief if Wu, who practises contemporary martial arts, accepts. In 1954, master Chan Hak-fu, of the White Crane style, and master Wu Gong-I, of the Tai Chi school, fought three bare-knuckle rounds in Macau. A debate over which kung fu style was better sparked the clash, which ended in a draw. Jacky Wu made the remark that touched off the latest debate during promotion of his film Lang Ya, or Legendary Assassin, on November 20. Asked if he knew about master Ip, the action star said: 'I first learned this name from the press about the conflicts in the filming of the life of Ip Man. I thought, 'Who is this man that there is such a fuss about?'' Wu was referring to a dispute between directors Wong Kar-wai and Wilson Yip Wai-shun over who could use Ip's name in the title of their movie. Yip's Ip Man opened last week. The remarks, which were posted on YouTube, angered Ving Tsun master Sin Kwok-lam of Man Keung Wushu Study Centre. He said the comments had caused 'extreme discontent' among Ving Tsun practitioners. 'It is like someone insulting the spiritual leader of a religion,' he said. Sin, who co-organised the challenge to Wu, said the fight - three rounds according to international sanda, or free-fighting, rules - could be held in April. Wu's management, Gold Typhoon, denied he showed disrespect to Ip.