Clifford Chance and Simpson Thacher & Bartlett have the lead roles on the upcoming $1.3 billion Hong Kong initial public offering of China Huishan Dairy Holdings Co.

The Shenyang-based milk producer is selling 3.8 billion shares in a price range of $0.22 to $0.26 apiece. The IPO is expected to be priced next week, with trading slated to begin at the end of the month.