导演认识了两位“朋友”。他与他们之间的交往构成了这部片子。开始，他并没有一个明确的计划要制作一部纪录片，但随着时间的推移，他开始有目的和他们交“朋友”。“朋友”们奇迹般地允许导演进入他们的生活，他们吸毒也贩毒的生活宝片视频APP　　纪录片的制作者和被拍者之间到底应该是一种什么样的关系，这部影片给出了它的解释。　　The director himself (who’s also a journalist) encountered in an interview a small group of people who, despite all odds, willingly invite him into their world of drug use and peddling. That’s how “Using” was born.　　What exactly is the relationship between a filmmaker and those being portrayed, “Using” has the answer.