As investigative techniques remain simple and shallow, sometimes even though offenders are under control, the dirty money can not be traced due to lack of knowledge in financial rules and practices.

• 侦查手段停留在较肤浅的层面和较简单的方式上，有时控制了犯罪分子，却因为不熟悉金融运行规则等业务，掌握不了赃款流向；