High Quality Content by WIKIPEDIA articles! The Old Thong Chai Medical Institution is a historic building in Singapore, and is located at Eu Tong Sen Street in the Singapore River Planning Area, within the Central Area, Singapore's central business district. The building was constructed in 1892, and housed one of the best known Chinese charity medical centres in Singapore. Traditional Chinese doctors or sinsehs used to dispense free treatment and medicine to patients of all races in Singapore. Today, it is used as a commercial building for the Singapore office for Forever Living Products.