Premise: He Ping () (born 1957 in Shanxi, China) is a Chinese film director, screenwriter and producer whose main filmography consists of a hybrid genre of Western-wuxia movies. He made three movies along this genre - "Swordsmen in Double Flag Town" (1991), "Sun Valley" (1995) and "Warriors of Heaven and Earth" (2004).
Hypothesis:  He made between three to five along this genre - "Swordsmen in Double Flag Town" (1991), "Sun Valley" (1995) and "Warriors of Heaven and Earth" (2004)