太子师傅公器化 / Crown-Prince Tutor Public Interest

Definition

太子师傅公器化 / crown-prince tutor public interest is the principle that the heir’s education is a state office serving the realm, not a private family appointment serving the crown prince’s maternal relatives.

Current Synthesis

Hanji 728 grounds the concept in 张义’s objection to 阴识. When 刘秀 asks who should teach the crown prince, officials and emperor alike prefer Yin Shi, who is the crown prince’s maternal uncle, zhijinwu, and Yuanlu Marquis. Zhang Yi reframes the choice with a public question: is the crown prince being established for the Yin family or for the realm?

Liu Xiu’s acceptance makes the principle concrete. He appoints Zhang Yi as crown-prince taifu because a scholar who can correct the emperor can also assist the heir. He also appoints 桓荣 crown-prince shaofu and rewards both men. Huan Rong then turns the gifts into a student-facing proof that study of old texts can produce honor.

The concept is a personnel-selection boundary. It does not deny that relatives can be capable; it says the default test for heir education must be role fitness and public accountability rather than kinship convenience.

Key Claims

• The crown prince’s teacher is a public role because the heir is being prepared for the realm.
• Maternal kinship and high office can make a candidate plausible but cannot by themselves settle the appointment.
• A useful tutor must be able to correct the ruler and support the heir, not merely belong to the right family.
• Public-interest selection can preserve the court’s legitimacy before succession by separating education from outer-relative advantage.
• Imperial gifts to teachers can honor learning when they follow a role-fit decision rather than a family-favor decision.

Evidence

• Kinship candidate: Hanji 728 says officials and Liu Xiu recommend Yin Shi, the crown prince’s maternal uncle, zhijinwu, and Yuanlu Marquis.
• Public-interest objection: Hanji 728 records Zhang Yi asking whether the crown prince is for the Yin family or the realm and arguing for worthy talent if for the realm.
• Appointment result: Hanji 728 says Liu Xiu accepts the correction and appoints Zhang Yi crown-prince taifu.
• Teacher honor after selection: Hanji 728 says Liu Xiu appoints Huan Rong crown-prince shaofu and gives carriages and horses to both teachers.
• Learning signal: Hanji 728 says Huan Rong shows the imperial gifts to students and attributes his honor to study of ancient books.

Counterevidence & Qualifications

This concept should not be read as a blanket claim that maternal relatives are always unfit. Hanji 728 does not attack Yin Shi’s personal ability. The narrow claim is that succession education has to be justified as a public role, and kinship convenience is insufficient when the role shapes the future ruler.

What Changed

• Created the concept from Hanji 728’s Zhang Yi, Yin Shi, and Huan Rong crown-prince tutor appointment scene.

Related Concepts

• 张义 - source figure who states the public-interest criterion.
• 阴识 - kinship candidate whose selection triggers the criterion.
• 桓荣 - fellow crown-prince teacher whose appointment and reward show learning honored after role-fit selection.
• 选官方式竞争 - broader appointment-selection concept that asks which channel should dominate a role.
• 外戚预防性约束 - related preventive limit on maternal-family power.
• 帝王尊师礼制 - later teacher-honor ritual branch connected through Huan Rong.