Hello, I'm Yamaguchi先生. I noticed that you added or changed content in an article, Viluppuram, but you didn't provide a reliable source. It's been removed and archived in the page history for now, but if you'd like to include a citation and re-add it, please do so. You can have a look at referencing for beginners. If you think I made a mistake, you can leave me a message on my talk page. When making a grand claim, such as "largest city" please define if this is by land area, population, population density, et cetera, and ensure that you have cited a reliable source which may be verified by others. Yamaguchi先生 ( talk) 17:05, 12 August 2021 (UTC) reply

Please do not add original research or novel syntheses of published material to articles as you apparently did to Viluppuram. Please cite a reliable source for all of your contributions. Thank you. Yamaguchi先生 ( talk) 18:30, 7 September 2021 (UTC) reply