一、三手以上信息坚决不买。信息传递环节越多内容越失真,所以一般要选择一手信息。信息好且单位可靠的,可以要二手的。 二、年年有的加工活不能接。加工任务只能是一批两批,有的加工活一放好几年,你要好好考虑:如果有人干过,为什么不再继续干了?如果一直没有人干,他们为什么不干? One, three or more hands will definitely not buy information. The more content the information transfer link is, the more distorted it is, so generally the first-hand information is selected. Information is good and the unit is reliable. It can be used. Second, there are processing operations that can not be answered every year. The processing task can only be a batch of two batches, and some processing activities are put in place for several years. You must consider carefully: If someone has done it, why not continue to do it? If there is no one to do, why don’t they do it?