Which is the Best Place to buy Chinese Crackers in Chennai this Diwali?

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Well i am from Chennai and these long years i have been buying Crackers for diwali made in Sivakasi sold in Chennai.. I have busted many sivakasi crackers like Hydrogen bombs, bijli to rockets and now i am tired and bored with Sivakasi Crackers now. Previous year (just a day before diwali) i heard in News about Chinese crackers been sold in places like Delhi and Dehradun and even in Pune.. (as I saw the news and the crackers were are pretty good and different). News said, Chinese Crackers even though are harmful but are in great demand..!! So i went on for searching these crackers in my place BUT did not find any. :( Now this year, i want to buy both Sivakasi and Chinese crackers as well.. Especially Chinese Cracker Guns (revolvers which shoots rocket pellets).. I wanna test how good these Chinese are.. :) (Check the photo below) But i want to know, were are these Chinese Crackers sold in CHENNAI... I stay at South Chennai near Tambaram... Were is it possible to find these Chinese crackers in Chennai.. Anyone from Chennai with previous experience, Pls Help.. And Wish u all a happy advanced Diwali..