Chan Wing-yan is a fictional character from the popular Hong Kong television series Line Walker. She is portrayed as a skilled undercover police officer who navigates the complexities of her dual identity while working to dismantle criminal organizations. Her character is known for her intelligence, resourcefulness, and determination. Throughout the series, Chan Wing-yan faces numerous challenges and moral dilemmas as she balances her duties as a police officer with the dangers of her undercover work. Her story highlights themes of loyalty, betrayal, and the struggle between good and evil in the world of crime and law enforcement.