3.There is a general debate nowadays about the problem of itinerant workers . Those who object to the rising migrant population argue that increasing numbers lead to rising crime rates and harm social stability . They believe that strict limits should be placed on migrants entering China ' s cities . But people who favor the influx of the cheap labor force , on the other hand , maintain that migrants are needed to support the massive urban infrastructure construction program .
　　目前，针对流动工人的问题展开了普遍的争论。反对流动工人增加的人认为这会导致犯罪率升高，从而危害社会稳定。他们主张应该严格限制进入中国城市的流动工人。但是，另一方面，支持廉价劳动力流入的人主张，为了支持大规模的城市基础设施建设规划，流动人口是必需的。