Which include lack of evidenee,procedure irregularity,inappropriate service of law, ultra vire,misuse of authority.The legal analysis of all the reasons helps legal administration by law.

• 主要包括因证据不足、程序违法、适用法律不当、超越职权、滥用职权等五方面，对以上原因进行法律分析，有助于更好的依法行政。