Xiao Beichen imprisoned Lin Hangjing.

Beauty of Knowing Geometry is a romantic drama with the theme of the Republic of China. It focuses on the love line between Xiao Beichen and Lin Xingjing, interspersed with various elements such as the war of resistance and affection. After marriage, Xiao Beichen and Lin Hangjing had many misunderstandings and even began to distrust each other.

Xiao Beichen imprisoned Lin Hangjing.

After they got married, Zheng Fengqi wanted to save Xiao Beichen's heart, so he deliberately designed to ruin Lin Xingjing's reputation. She asked Jiangqiao to help herself and destroy the marriage between Xiao Beichen and Lin Hangjing.

Jiangqiao asks Lin Hangjing to meet in the coffee shop for coffee. While Lin Hangjing went to the bathroom, Jiangqiao drugged Lin Hangjing's coffee. Lin Hangjing woke up in the hotel, opened his eyes and saw Jiangqiao unbuttoning his clothes. He immediately shouted for help, and Jiangqiao fled in fear. When Xiao Beichen received the news that Lin Hangjing and Jiangqiao were having a private meeting in the hotel, she saw Lin Hangjing disheveled and angrily scolded her for not knowing how to love herself. Lin Hangjing wanted to get some comfort from Xiao Beichen, but she didn't expect Xiao Beichen to believe her from beginning to end. In that case, it's no use explaining it any more.

Xiao Beichen was sad and drunk, mistakenly thinking that Zheng Fengqi was Lin Hangjing, and revealed that they were married by agreement. The newspaper published a report on Lin Xingjing's secret meeting with mysterious wealthy businessmen, with photos attached. This incident caused a lot of publicity and shame to Xiao's family, but Zheng Rugby suddenly came out to get married, but he didn't get Xiao Haishan's consent, so he provoked Zheng Rugby to cooperate with Kang and split Xiao's power in two.

At the same time, Zheng Fengqi showed his intention to Xiao Beichen and hugged Xiao Beichen. Lin Hangjing came to Xiaobeichen just to see this scene, and left in a dim mood. Xiao Beichen found Lin Hangjing and chased him out without thinking about Lin Hangjing's misunderstanding. When it began to snow heavily, Xiao Beichen found Lin Hangjing in the street and volunteered to hope that they would stop quarreling in the future. Because of Lin Hangjing, he realized how ridiculous the past was, and because of Lin Hangjing, he survived on the battlefield and understood the meaning of life. Xiao Beichen put a scarf on Lin Hangjing, and they kissed in the snow and finally made up.

A few days later, Zimu and Lin Hangjing proposed to go to Yulin together. Lin Hangjing suggested that Zimu was unfaithful because she fell in love with Xiao Beichen. At this time, Lin Hangjing found Xiao Beichen following himself and angrily questioned Xiao Beichen whether there was even the most basic trust between them. So the two had a quarrel, and Xiao Beichen threatened to imprison Lin Hangjing.