Please summarize the article "Getting the Birthday Guide by Wisdom". [Requirements: Plot and character description must be clear. Urgent, fast. I want more if you answer well.]
" Getting the Birthday Plan with Wisdom " was a novel by the Ming Dynasty novelist Wu Chengen. It told the story of a steamed bun shop owner, Chen San, Monk Sha, Huang Wenhu, and others who went through hardships to get the Birthday Plan with wisdom. The protagonist of the story, Chen San, was a quick-witted and shrewd mantou shop owner. He ran a steamed bun shop with Monk Sand, but business had never been good. In order to improve their business, they came up with a clever plan to deceive the buyer by buying a large number of steamed buns and falsely delivering them. In the story, Monk Sha was an open-minded and quick-witted man. He and Chen San had encountered many challenges along the way, but he always maintained an optimistic attitude. Huang Wenhu was a greedy and cunning criminal. He secretly supported Chen San to seize the birthday scroll but was eventually seen through by Monk Sand and others. The whole story was full of ups and downs, and the characters were vivid. Through the wisdom and courage of Chen San, Monk Sha, and others, it showed the complexity of the customs and human nature of the Ming Dynasty society.