Ask for a movie, gifted children, it seems to be a Hong Kong movie.

Plot: One Bean Ding is a lovely little boy. He went abroad to visit relatives with his mother. When he transited in Hong Kong, he met an elderly Hong Kong girl Billie, and they slipped out of the hotel to play in the city. A bean was abducted by a man and a woman to a rich family and separated from Billie. Douding used the Hong Kong alarm knowledge she learned from her mother to call the police so that the police could find clues to solve the case. Finally, with the help of children and police in Hong Kong, the One Bean defeated the bad guys with her intelligence and knowledge and returned to her mother.