What is the fine-grained topic of the following text: The business, which bid on the site for Rs 181 crore in the auction owned by GMADA (Greater Mohali Area Development Authority), also intends to install roughly 1,250 housing units underneath the undertaking, Hero Realty, the true estate arm of Hero Corporate Service Ltd, said in an announcement. Only return the topic.
Hero Realty's bid on GMADA auction site and planned housing project