Some common plot devices in fiction are the 'MacGuffin'. It's an object or goal that the characters pursue, like the One Ring in 'The Lord of the Rings'. Another is the 'deus ex machina', where an unexpected event or character suddenly solves a seemingly unsolvable problem. And there's the 'red herring', which misleads the characters and the readers by introducing false clues.
One way to create engaging fictional characters is through dialogue. The way they talk can reveal a lot about them. A character who uses a lot of sarcasm might be hiding their true feelings. Also, consider their goals. A character aiming to become the best magician in the land will have different experiences and challenges. Their environment also matters. A character living in a magical forest will be different from one in a bustling city.
The article you provided did not specify which famous work it came from. If you can provide more relevant information, I will try my best to answer your questions.
Jin Yong's works were martial arts novels that were widely spread and influenced many readers. His works have been created and revised many times. His most famous works include The Return of the Condor Heroes, The Eight Dragons and Dragons, The Smiling Proud Jianghu, and The Deer and Cauldron.
Because I don't know which novel was written by Mark Twain. Mark Twain was a famous American novelist and short story writer. His works were widely circulated and had a profound influence on American literature.