According to fire brigade officials, all fire tenders were taking part in the fire-fighting operation at the factory.
No loss of life has been reported as there were no labourers at the time of the incident.
The fire, according to reports, has reached the third-floor of the factory.
According to Director KMC Masood Alam, the fire was reported at 2:35 PM. He said that the fire brigade vehicles reached the site late due to traffic.
Due to the intensity of the fire, fire brigade officials were not able to enter the building.
Special coverage on China's Two Party Sessions by The Daily Mail - People's Daily