NEW YORK CITY — Harling Chan has sold a six-story apartment building at 109 Madison St. in Manhattan for $4.5 million. The 9,480-square-foot building contains 22 units and two stores. The property is located in southeast Chinatown, which is also known as Two Bridges, situated between the Manhattan and Brooklyn bridges. Roni Abudi of GFI Realty Services represented the buyer, a local investor, in the transaction. Jeremy Curtin of GFI Realty Services represented the seller.