SPL: Sha Po Lang (released in the United States as Kill Zone) is a 2005 Hong Kong action film written and directed by Wilson Yip, and starring Donnie Yen, Sammo Hung and Simon Yam. The film was released in Hong Kong on 18 November 2005. It was followed by SPL 2 in 2015, and Paradox, released in 2017. The title Sha Po Lang refers to three words derived from Chinese astrology that each represent a different star capable of good or evil depending on their position in the heavens.