Aligarh, Dec 30 (ANI): Aligarh, located in India's northern state of Uttar Pradesh, is a big industrial city of the state. It is also known as Taala Nagari or the City of Locks as it is amongst the largest manufacturers and suppliers of locks in India. And, it is not just the lock industry, which make the city famous, but also the harmony that exists between people of different religions working in other industries as well. One such unit in the city that exemplifies this fact is the printing and packaging unit where Hindus and Muslims are involved in print and packaging of different commodities. The workers work for long hours and also look after each other and their work like a family. Mutual cooperation is responsible for the success of the business.