Kolkata is the center of India's steel and hemp textile industry. Kolkata (Bengali: _ _ _ _ _ _, English: Kolkata/ old name: Kolkata) is the capital of West Bengal, India. It is located in the Ganges Delta in eastern India, on the east bank of the Giant River (a tributary of the Ganges). It is the third largest city in India (next to Mumbai and New Delhi), the largest bast spinning center in India, and the jute output of the world's largest cities is among the best. During the colonial period, Kolkata was the capital of British India from 1772 to191. During this period, the city has been the educational, scientific, cultural and political center of modern India, and a large number of Victorian buildings left at that time are still well preserved. However, after India's independence in 1947, the city experienced long-term economic stagnation due to various unfavorable factors. However, since 2000, economic recovery has replaced the morbid decline, and cities have begun to regenerate the vitality of growth.

Kolkata is also a city with a unique social, political and cultural background, and its revolutionary history from Indian independence movement to left-wing movement and trade union movement is world-famous. India-led Left Front has been in power for 30 years in West Bengal, where Kolkata is located, through democratic elections.