Yang Cao purchased a condo at 111 West 57th Street in Manhattan's Central Park South for $12 million, totaling 4,492 square feet. The price equates to $2,671 per square foot. The sellers of the property were Michael Stern and Michael Maloney.

Summary of transaction details:

• Property Type: Condo
• Transaction Amount: $12,000,000
• Square Footage: 4,492
• Price Per Square Foot: $2,671
• Address: 111 West 57th Street, Central Park South, Manhattan
• Buyer: Yang Cao
• Sellers: Michael Stern & Michael Maloney

This deal involved the coordinated efforts of Yang Cao as the buyer, while Michael Stern and Michael Maloney represented the selling side of the transaction, facilitating the exchange of the property.