Kolkata, India (CNN) - Kolkata’s Chinese community has been a key part of the city’s cultural and social fabric for more than 200 years. But now the city’s “Tonga” town is disappearing.

Once home to tens of thousands of ethnic Chinese, Kolkata has only around 2,000 today. They came as immigrants to India in the late 18th century, most finding work in this bustling port city.

Many left India because of  ethnic tensions following the country's war with China in 1962. Now, more are going – though their reasons are different.

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