sentences:  Sun Yat-sen Playlot Park, a small, park, was created in the mid-1970s; however, the community wanted a larger open park space.The Chinese American Development Corporation, a private real estate firm formed by Ping Tom then purchased a former rail yard in 1989.After construction of Chinatown Square began on this property, the CPD purchased approximately of unused land along the Chicago River in 1991, along with an additional that extended along the river north of 18th Street.