调查取证是我们查案工作中最艰苦、最费脑筋、也是最重要的环节，我到酒钢（集团）纪委工作多年，至今，我对那次调查取证仍记忆犹新。那年，群众举报下属企业公司在销售钢坯业务中有收现金、私设小金库的违纪问题。下属企业公司究竟有没有违纪问题？我们决定先从外围入手，在 Investigation and evidence collection are the most difficult and most thought-provoking and most important links in our investigation work. I have worked in Jiuquan Iron and Steel (Group) Commission for Discipline Inspection for many years. So far, I still remember the evidence collected from the investigation. That year, the masses reported subordinate enterprises in the sale of billets business have received cash, private small coffers discipline violations. Subordinate company whether there is any violation of discipline? We decided to start from the periphery, at