Please answer the following question: Question: Who is Rusty? If there is no answer, please output "Insufficient information to provide an answer.". Movie title: The Kid Context: This drama highlights the social problems of single parents struggling to raise children. Leslie Cheung plays the role of a retired fund-manager, Wing who lost his entire fortune in a financial mishap and was severely depressed until he discovered an abandoned baby boy in his yacht which he has not sold off at that time. He sought to raise the baby as his own son, encountering many happy moments even though he was not financially sound. His happiness is cruelly cut short a few years later as the now toddler's real mother returns and wishes to raise her own son again, while he attempts to prevent this as he loved his adopted son very much. The final touching scene depicts the inevitable as his beloved adopted son followed his mother into her luxury car while Wing fought back tears despite him voluntarily relenting into allowing the child to leave.
A:
Insufficient information to provide an answer.