Alimentation Couche Tard Inc, a Canadian retailer, and China based Tencent Holdings Ltd are on the short list of possible buyers for a $16 billion minority stake in world's largest fuel retailer, Sinopec Sales. Other companies that are also being considered include China Life Insurance Ltd, ENN Energy Holdings Ltd, Fosun Group, Hopu Investment Management and Affinity Equity Partners. The company is looking to sell 30% of its shares before the end of 2014.