Chinese Indians take comfort in mahjong as Kolkata Chinatown shrinks around them

• They chat in fluent Bengali, but the players around a mahjong table in Tiretta Bazaar, one of two Chinatowns in Kolkata, India, are ethnically Chinese
• Once home to 20,000 – migrants from Guangdong, Shandong and Hubei in China – Tiretta nowadays is a place of run-down buildings, chipped paintwork, and dust