Because of the two-sides of undertakings concentration,the purpose of controling it under antitrust law is not simply veto down it,but is seeking to prevent and remove the effects of eliminating or limiting competition caused by it.it is not a sole way for antitrust anthority agencies to prohibit undertakings concentration of the effects of eliminating or limiting competion. Antitrust law must weigh the interest between prohibition and freedom to find a compromise way that not only can meet the undertakings...