"In the world" Why didn't Chun Yan let him read Lu Chuan's letter?

The reason why Chun Yan refused to read Lu Chuan's letter in the world was that Qiao Chunyan was worried that Lu Chuan's remarks would bring trouble to everyone.

In the play, Lu Chuan expressed his dissatisfaction with the social atmosphere at that time in his letter. When Zhou Bingkun read that "Beijing is now a city full of troubles and dark clouds." When this sentence was said, all the people were eating and listening, especially relaxed. Only Joe, who is particularly sensitive to politics, grabbed the letter and burned it, and repeatedly reminded others that she had never seen Lu Chuan's letter.

Chun Yan's husband's reaction to this letter is:

At a gathering of six gentlemen, Zhou Bingkun read Lu Chuan's letter to everyone in public. In the process of reading the letter, Cao Debao disdained and even said sourly: "It's only less than a year, and we'll have a class." He also said that Zhou Bingkun should have been admitted to this university. Finally, when Zhou Bingkun asked him if he would still study, he said firmly, "Don't study, it's annoying."

Cao Debao's various reactions, the audience simply can't see his happiness when he receives a letter from his friend. On the contrary, he showed jealousy of Lu Chuan's going to college and disdain for the contents of the letter. Qiao Chunyan and his wife, one jealous of Lu Chuan and the other worried about their political future, failed to read the letter completely and were burned to death.