"It's pretty tiring," she explained, having to test the functions of each camera that comes her way. "The pressure can be big sometimes." But despite the stress, Zhao's job at the factory is a good one, she said. Air conditioning in the dorms, clean facilities and what she considers high pay are some of the biggest perks.

"I don't want to change my job; I think it's pretty good," said Zhao, who can earn between 2,000 and 4,000 yuan (US$315 to $630) a month depending on how much overtime she does. "I feel the salary is enough. I don't spend that much."

Working conditions at Chinese manufacturing plants have come under close scrutiny, yet jobs at the factories remain some of the most coveted in China for workers like Zhao who have limited career opportunities. For them, it's about earning a decent salary even if the work is highly monotonous with few, if any, long-term benefits. IDG News Service visited Tianjin with a labor rights activist to interview factory workers for this story.

"I'm just here to make money," said a 23-year-old woman surnamed Wang, who also works at Samsung's camera factory in Tianjin. "A lot of people just come here to make money," she added.

Samsung's factory at the Micro-electronics Industrial Park in Tianjin is the company's largest in the country, with an estimated 50,000 workers employed there by Samsung and its suppliers, according to a labor expert. Most of the workers assemble mobile phones, TVs, LEDs and cameras, among other products, and live in nearby dorms.