我国立案管辖的权限分工是非常明确的，界定也是非常严格的，在理论上不存在管辖权交叉和代侦问题。那么在实践当中，是否存在应当由且必须由某一司法机关直接侦查其他司法机关所管辖的案件的情况呢？即是否存在着并案侦查问题？回答是肯定的。例如，公安机关在办理一起盗窃案 The jurisdiction division of jurisdiction in China is very clear. The definition is also very strict. There is no theoretical problem of cross-jurisdiction and generation investigation. So, in practice, is there any case where the cases governed by other judicial organs should be investigated directly by a certain judicial organ? Is there any case investigation? The answer is yes. For example, public security organs are handling a theft case