US-based Citadel Securities LLC has emerged as the only bidder for Credit Suisse China (Credit Suisse AG, China). The firm has made a non-binding offer for the unit that is believed to be worth between CNY 1.5 billion to CNY 2 billion. UBS Group AG (SWX:UBSG), which had taken over Credit Suisse recently, is planning to sell the unit even though it has plans to expand in China.