Source: Straits Times OnlinePHOTO: ENCORE FILMSSinger and actress Charlie Young, one of the biggest stars in Hong Kong in the mid-1990s, is happy to play a bit part in the crime thriller Cold War, which opens here tomorrow.She tells Life! she did it to support the film's first-time directors Longman Leung and Sunny Luk.In the movie, which centres on the rescue operation of a hijacked police van, she plays the feisty head of police public relations. "The moment I read the script I could tell that thetwo had done a lot of homework," says the actress, 38. "I thought if I could take part and support in a small way, I would do so happily."It also meant that she got to reunite with two of her former co-stars Tony Leung Ka Fai and Aaron Kwok, who play rival deputy police commissioners in the new movie.She had worked with Leung on her first movie, the gongfu drama Ashes Of Time (1994): "I still have a strong impression of that I had just entered the entertainment industry and he really looked out for me."Her association with Kwok, whom she calls "an important friend", dates back to 1993, when she appeared with him in a jewellery commercial and went on to star in his music videos.The pair did work together again until 2006, when they played an estranged couple on the award-winning film, After This Our Exile, a family drama."Actually, we haven't worked together very much," says Young. "But every time we do, it has left a strong impression. The characters and story are different each time, so the sparks are different."