US-based luxury department store operator Neiman Marcus will expand into China by the end of 2012. It will invest $28m (£17.6m) in local ecommerce company Glamour Sales Holding, supporting its existing flash sales sites and building a new online business. Glamour Sales Holding was founded in 2009 and operates Glamour-sales.com.cn in China and Glamour-sales.com in Japan.