Sullivan & Cromwell is acting for Chinese dairy products maker China Mengniu Dairy Co. Ltd. on its proposed acquisition of infant formula company Yashili International Holdings for $1.7 billion.

Hong Kong partner Kay Ian Ng and Beijing partner Gwen Wong led Sullivan & Cromwell’s team on the deal. The firm also advised on a loan arrangement to finance the acquisition. Ng previously advised the underwriters in China Mengniu’s 2004 Hong Kong initial public offering.