Ask for the name of a foreign novel and only remember the general content.

according to the plot description you provided, this novel may be Oliver Twist by Charles Dickens.

The novel tells the story of an orphan boy named Oliver, who has experienced a series of hardships such as poverty, reformatory, asylum, gangs, and finally regained his freedom and found his relatives after countless adventures.

Among them, similar to the story you mentioned, the boy was forced to slide down the steep stairs after fleeing to his relatives. He was also kidnapped by a group of prostitutes and sold to a boat as a sailor.

Although your description is slightly different from the plot of the novel, I suggest you carefully recall the details to confirm whether it is this novel. I hope I can help you!