More than 100,000 people have signed up for a massive recruitment drive by Apple’s supplier Foxconn for the largest iPhone factory in China, reports CNN, citing Chinese state media. “The quota is finally met. And our hiring process is now closed temporarily,” a Foxconn executive, Yang Han, in Zhengzhou told state news outlet Yicai. The hiring spree comes at a time when Apple is facing significant supply chain constraints at the assembly facility located in the central Chinese city of Zhengzhou and expects iPhone 14 shipments to be hit just as the key holiday shopping season begins.

Zhengzhou is the world’s largest iPhone assembly site. It typically accounts for approximately 50% to 60% of Foxconn’s global iPhone assembly capacity, according to Mirko Woitzik, global director of intelligence solutions at Everstream, a provider of supply chain risk analytics. Apple has warned of the disruption to its supply chain, saying that customers will feel an impact.

Foxconn, alongside the staffing firms that support them, has faced critical scrutiny from organisations such as China Labor Watch which reported last week that 1,000 Foxconn dispatch workers gathered at the main entrance of Foxconn Area C to protest over owed wages and benefits. The Chinese government sent more than 100 police to control the protest.