In october 1997 , china gave the united states assurances regarding its nuclear cooperation with iran . china agreed to end cooperation with iran on supplying a uranium conversion facility ( ucf ) and to end further cooperation after completing within a reasonable period of time two existing projects - - a zero - power reactor and a zirconium production plant 方面的合作,并在合理的时间内完成两个现有项目一个零功率核反应堆和一座生产锆的工厂以后,终止与伊朗的进一步合作。我们将继续对中国与伊朗有关实体今后的往来是否同中方做出的“不进行新的核合作”的保证相一致做出评估。