Workers at the Foxconn manufacturing facility charged with assembling Apple's iPhone 5 handset shut down the factory on Friday in a protest over working conditions.
Advocacy site China Labor Watch (CLW) said that the strike, which began at 1pm local time, was over complaints workers had about conditions and quality demands.
According to the CLW report, workers are objecting to a lack of proper training on correct assembly of components for the handset and a lack of clarity in the quality control standards and requirements in place.
The site said that workers have been put under additional strain because they do not feel properly equipped to meet Foxconn and Apple's quality control standards for handsets.
"It was reported that factory management and Apple, despite design defects, raised strict quality demands on workers, including indentations standards of 0.02mm and demands related to scratches on frames and back covers," CLW said in its report.
"With such demands, employees could not even turn out iPhones that met the standard. This led to a tremendous amount of pressure on workers."
The strike brings yet another black eye to a Foxconn unit which is already under fire for the treatment of its workers. Human rights organisations have had a close eye on the company since a rash of suicides at employee housing facilities made international headlines.
Last month, some 2,000 employees disrupted work at the facility when a riot broke out over working conditions.
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