Jia Jia and Xiao Ming became colleagues. Seeing that there were no obstacles for the two of them to communicate in sign language, Lao Si said insincerely that it would be good. Back in the yard, Old Four looked at Grandpa's portrait and remembered that Grandpa had told him to take good care of Jiajia before his death. He decided to fulfill Jiajia and Xiaoming. Jia Jia and Xiao Ming are getting married, and Lao Si is still taking wedding photos with them.

As a family member, Laosi wanted to rent a wedding car to send Jiajia to get married, so she asked Laosi for help. Between the lines of Old Four, Old Three understands that Old Four loves Jiajia, and threatens that Old Four won't help renting a car if he doesn't admit it. Laosi admits that he really likes Jiajia, but he has asthma, and he earns enough money to live today. He was worried that he would suddenly leave one day, leaving Jia Jia a deaf person. He can't just think of himself. Old four just loves Jiajia too much, so it doesn't matter what she does as long as Jiajia is happy. Old three regrets that old four is the only great sage in their Guo family.

Today is Jia Jia and Xiao Ming's wedding day. The wedding car where the groom came to pick up the bride has arrived at the gate of the yard. Old four went to the house to call Jia Jia, but Jia Jia uncharacteristically locked the door. Old four understood that Jia Jia had something to say to him, so he sat down. Jia Jia doesn't want to get married. She wrote on a piece of paper that if she gets married, she can't be with her fourth child forever. Old four called Jia Jia silly, and Jia Jia wrote on the paper that old four could not stand guard for her.

Old four was very sad after reading what Jia Jia wrote, but he patiently explained that Jia Jia was married and Xiaoming would stand guard for Jia Jia all his life. Lao Si gave Jia Jia to Xiao Ming and told Xiao Ming to treat Jia Jia well all his life. Looking at the fading wedding car and the quiet street, Old Four couldn't help feeling sad.