Dog-Blood Case / 狗血案

Definition

Dog-Blood Case / 狗血案 names the 3 CE Wang Mang-era incident in which 吕宽 spilled dog blood at 王莽’s gate as part of a failed attempt by 王宇 and 吴章 to frighten Wang Mang into allowing 卫太后 access to 汉平帝.

Current Synthesis

The case is a small operational failure with large political consequences. The grievance begins with maternal access: Wang Mang blocks Pingdi’s Wei birth relatives from entering Chang’an, and Wang Yu fears direct remonstrance. A deferential Wei Taihou memorial fails because Wang Mang substitutes material grants for access. Wu Zhang then proposes a “变怪” tactic that treats Wang Mang’s fear of spirits and signs as a pressure point.

The tactic misreads the regime. Wang Mang already operates in a political world where signs, portents, and ritual claims matter, so a crude staged anomaly is easy to convert into guilt. Once Lu Kuan is discovered, the case reaches Wang Yu, destroys Wu Zhang, harms the Wei clan, and lets Wang Mang turn family punishment into public virtue through “大义灭亲.”

As a concept, the dog-blood case connects 祥瑞政治 to 巫蛊政治恐慌. It is not a settled proof that all participants intended curse magic. Its importance is that staged hidden ritual action could be read inside the same danger field as厌胜 or wugu and then amplified into state violence.

Key Claims

• Maternal-family exclusion, not dog blood by itself, is the case’s political trigger.
• Indirect persuasion becomes dangerous when direct remonstrance is too risky.
• Staged anomaly tactics can backfire when the target already controls sign interpretation.
• Wugu-adjacent fear lets a symbolic act become a purge trigger.
• Wang Mang converts the punishment of his own son into moral-political capital.
• The case weakens the Wei consort-kin network and clarifies the later memory of Wang Yu’s imprisonment.

Evidence

• Blocked access and first memorial: Hanji 616 says Wang Yu wants to help Wei Taihou reach Pingdi, first by arranging a deferential memorial.
• Failed compensation: Hanji 616 says Wang Mang increases Wei Taihou’s fief and gifts but still blocks her Chang’an access.
• Staged anomaly: Hanji 616 says Wu Zhang proposes a “变怪” to frighten Wang Mang and Lu Kuan spills dog blood at Wang Mang’s gate.
• Punishment chain: Hanji 616 records Lu Kuan’s death, Wang Yu’s forced death, Lu Yan’s imprisonment and postpartum execution order, Wu Zhang’s execution, student禁锢, and Wei-clan destruction.
• Later household memory: Hanji 634 later refers back to Wang Yu’s earlier imprisonment and his wife’s prison death.

Counterevidence & Qualifications

The source does not prove that the act was a real curse or that all participants understood it as wugu in a strict legal sense. It supports a narrower claim: in a palace environment already sensitive to spirits, anomalies, and hidden ritual harm, dog blood at the regent’s gate could be treated as grave political danger. Wang Mang’s inner belief, the exact legal category, and the full interrogation record remain source-scoped.

What Changed

• Created the dog-blood case as a bounded concept connecting Wei maternal access, staged anomaly, wugu-adjacent panic, and Wang Mang’s family-punishment performance.

Related Concepts

• 巫蛊政治恐慌 - broader hidden-ritual accusation field into which the case can be read.
• 祥瑞政治 - adjacent sign-politics field that makes staged anomalies politically legible.
• 过继宗法礼制政治 - downstream doctrine Wang Mang uses in Hanji 618 to justify subordinating Pingdi’s Wei birth ties.
• 道德名望政治资本 - reputation mechanism visible when Wang Mang is praised for punishing his own son.
• 外戚专权与清算 - consort-kin power field weakened when the Wei clan is purged.