They and their outlines.

Yang Xiaolin, a salesgirl in the grocery store, met Gu Yuanyuan, a female worker in the motor factory, through the introduction of her cousin Ling Di. They are both clever, but they are not responsible for their work. Xiaolin's twin brother Dalin is a buyer of the Institute. In order to purchase the high-strength adhesive urgently needed in the factory, he met Gu Fangfang, who is a round twin sister and an advanced worker in the factory.

Once, Xiao Lin and Yuan Yuan met in the park, and Dalin went to meet her parents secretly. Dalin mistook Yuan Yuan for Fangfang, and Yuan Yuan mistook Dalin for Kobayashi, making a joke.

A series of misunderstandings made Yuan Yuan make a fool of himself repeatedly, and he got into trouble with Kobayashi. Dalin ran around to help Fangfang find the "No.8 resin" needed for the experiment. Appendicitis broke out on the way and was taken to the hospital. In the ward, he learned that Changzhou Chemical Plant produced "No.8 resin", and quickly changed his coat with Kobayashi who came to visit and slipped out of the hospital. He endured the pain and found the body, which made Fangfang deeply grateful. At this time, Kobayashi, who was wearing Dalin's patient suit, took medicine and injections, suffered a lot and was educated.

The sample of the adhesive has been successfully trial-produced. Kobayashi came to Fangfang's house to sample his younger brother and accidentally knocked the adhesive to the ground. As soon as Xiao Lin stepped on it, he was firmly stuck. He personally proved that Fangfang's experiment was successful.

Dalin and Fangfang have strengthened their pure love in their work. Kobayashi and Yuanyuan were also motivated to actively and seriously devote themselves to the four modernizations. Dalin and Xiaolin are twin brothers, Fangfang and Yuanyuan are twin sisters.

Xiao Lin works as a shop assistant in a food store, and Yuan Yuan works in an automobile factory. Both of them are clever, but they lack enthusiasm for work. Dalin is a buyer in a research institute, and Fangfang is an experimenter in a chemical plant. Both of them work very hard.

Xiao Lin met Yuan Yuan through her cousin's introduction. In order to purchase the high-strength adhesive urgently needed by the office, Dalin met Fang Fang, who was in charge of the trial production of the adhesive.

Xiao Lin dated Yuan Yuan, while Da Lin and his parents secretly went to see it, which led to a misunderstanding. Dalin took Yuanyuan as a square, and Yuanyuan mistook Dalin for Kobayashi, which led to a series of jokes. Fangfang's experiment needs "No.8 resin". Dalin ran around to help her find it, but she was admitted to the hospital because of appendicitis. After learning that there was "No.8 resin" in a factory in Changzhou, Dalin and Xiaolin exchanged coats and sneaked out of the hospital to find it, which made Fangfang very moved.

Kobayashi came to Fangfang to sample his younger brother, accidentally knocked over the adhesive and was firmly stuck, which inadvertently proved the success of the experiment. Dalin and Fangfang firmly established sincere love in their work. Kobayashi and Yuanyuan also realized their mistakes and actively put themselves into their work.