China O'Brien I & II The Complete 2-Film Collection with 2pcs 4k Ultra HD + 2pcs Blu-ray with Limited Edition Slipcover(s). In China O'Brien I, an urban policewoman (Cynthia Rothrock) returns to Utah and becomes sheriff to avenge her slain father with kung fu. China O'Brien II follows the now female sheriff (Cynthia Rothrock) and her friends (Richard Norton and Keith Cooke) as they try a little kung fu on an escaped drug lord and his gang.