Thank you to everyone who replied to me about this ... both online and offline.
In following the various links I came to https://sites.google.com/site/ddmission05/home/chinese-lucky-stars which states, inter alia, 'From what I could find on the internet, the whole custom of making these lucky stars and giving them as gifts with meaning really took off after in a 1980s Chinese movie, a woman gave a man a jar of these folded stars as a blessing (3)' (3) cites http://answers.yahoo.com/question/index?qid=20080512211307AADUvWM but I can't get to that answer. Does anyone know anything about this film, what it was called, and where it can be viewed? Thanks Dave