The natural monopoly characteristics formed by transmission network in gas trade and the double functions(administrative function,legal person group)make management nuclear and estate policy undefined to cause thesystem reforms very difficult.

• 但天然气行业具有由输送网络等形成的自然垄断特征和行业总公司具有的双重职能（行政职能、法人团体），因而管理不明晰，产业政策不明确，给体制改革带来很大困难。