He wrote this letter before his marriage to Jiang Yao. Back then, he was busted by Zhou Weiqi and Chen Xuyao for secretly looking at her pictures. After knowing his intentions for Jiang Yao, they started coming up with plenty of ideas for Lu Xingzhi to go after her.
Confessing with a love letter was one of the methods mentioned. Lu Xingzhi read plenty of romantic and lovey-dovey publications just to write it. He did not have the courage to give it to Jiang Yao even after completing it, but he did not want to throw it away as well. In the end, it was placed under lock and key together with other things in the drawer.
Lu Xingzhi was positive that Jiang Yao would never come to see this love letter.
Who would have thought!
"You needed their help in writing a love letter? Tsk!" Jiang Yao said disapprovingly. Lu Xingzhi did not look happy, and knowing that he was embarrassed, she mellowed out and put the letter back into her bag.