2008, Dongguan, Guangdong.
Eighteen-year-old Lan Xing left her hometown in Hunan for the first time. She and her sister were crowded on the green train heading south, and their minds were filled with the bustling cities in Hong Kong and Taiwan dramas.
Only when she arrived did she realize that what was waiting for her was an assembly line, a label, a dormitory, and a small world called "Electronics Factory".
Here, she met a group of similarly young workers - the righteous Sister Fang, her gentle best friend, and the boy Qing who made her heart beat for the first time.
She thought she was grabbing a shoulder to lean on, but one night, she bumped into him hugging someone else.
My first love was broken like this.
Later, Zhou Yi, a handsome boy she met at the skating rink, pursued her vigorously, but after dating, he went to other provinces.
Later, Xiao Kai, a boy she met in the Internet cafe, moved to the door opposite her, and he tried different ways to get close to her every day...
In those years, the factory machines were running day and night, and their youth was also flowing on the assembly line.
Some people left, some stayed, some settled in Dongguan, and some never left.
This is a story about work, love and growth.
It is also the true youth of thousands of migrant girls working in the south.