---
title: "Bi Disc — AP Art History Definition & Exam Guide"
description: "A bi disc is a circular jade disc with a central hole symbolizing heaven, key to reading the Funeral Banner of Lady Dai in AP Art History Unit 8."
canonical: "https://fiveable.me/ap-art-history/key-terms/bi-disc"
type: "key-term"
subject: "AP Art History"
unit: "Unit 8"
---

# Bi Disc — AP Art History Definition & Exam Guide

## Definition

A bi disc is a flat circular jade disc with a hole in the center, an ancient Chinese symbol of heaven and the celestial realm; in AP Art History it appears in the Funeral Banner of Lady Dai (c. 180 BCE), where it marks the soul's passage from earth to heaven in a Han tomb context (Topic 8.3).

## What It Is

A bi disc (pronounced "bee") is a flat, circular disc carved from [jade](/ap-art-history/unit-1 "fv-autolink") with a round hole punched through the center. In Chinese culture, jade was the most precious material you could be buried with, prized for its hardness, its glow, and its association with immortality. The disc shape itself stood for heaven, so placing bi discs in a tomb was a way of connecting the dead to the [celestial realm](/ap-art-history/key-terms/celestial-realm "fv-autolink").

For [AP Art History](/ap-art-history "fv-autolink"), the bi disc matters most as iconography inside the **Funeral Banner of Lady Dai (Xin Zhui)**, a painted silk banner from a Han dynasty tomb at Mawangdui, c. 180 BCE. Near the center of the banner, two dragons thread their bodies through a bi disc, marking the transition point where Lady Dai's soul moves from the earthly realm up toward heaven. You don't need to know bi discs as a standalone work in the 250-image set. You need to recognize the disc in the banner and explain what it does for the work's meaning and function.

## Why It Matters

The bi disc lives in **Topic 8.3 (China and the Koreas)** within **[Unit 8](/ap-art-history/unit-8 "fv-autolink"): [South, East, and Southeast Asia](/ap-art-history/key-terms/south-east-and-southeast-asia "fv-autolink"), 300 BCE-1980 CE**. It supports learning objective **AP Art History 8.3.A**, which asks you to explain how cultural ideas shape art and art making. The bi disc is a perfect example of how a long-standing Chinese belief (jade as a bridge between humans and heaven, dating back thousands of years before the Han) gets absorbed into a specific funerary object. When you analyze the Funeral Banner, the bi disc is your evidence that the banner isn't just a portrait. It's a cosmological map designed to guide a soul, which connects directly to the exam's emphasis on a work's intended function and audience.

## Connections

### [Funeral Banner of Lady Dai (Unit 8)](/ap-art-history/key-terms/funeral-banner-of-lady-dai)

This is where the bi disc actually shows up in the image set. Dragons [weaving](/ap-art-history/unit-6/cultural-contexts-african-art/study-guide/Lr4Zp9tK7yemW1k0tj7F "fv-autolink") through the disc mark the doorway between Lady Dai's earthly life and the heavenly realm above. If you can point to the bi disc and say what it symbolizes, you can explain the whole banner's function as a guide for the soul.

### [Horizontal registers (Unit 8)](/ap-art-history/key-terms/horizontal-registers)

The Funeral Banner is organized in stacked zones for heaven, earth, and the underworld. The bi disc sits at the seam between zones, so the two ideas work together. [Registers](/ap-art-history/key-terms/registers "fv-autolink") give the banner its structure, and the bi disc tells you where one realm ends and the next begins.

### [Feng shui (Unit 8)](/ap-art-history/key-terms/feng-shui)

Both concepts come from the same impulse, the Chinese belief that built and made things should align with cosmic order. [Feng shui](/ap-art-history/key-terms/feng-shui "fv-autolink") orients architecture to the cosmos; the bi disc embeds the cosmos (heaven as a circle) into a portable jade object.

### Hall of Supreme Harmony, Forbidden City (Unit 8)

Centuries later, Chinese imperial architecture still encoded the link between rulers and heaven. The bi disc is the small, early version of the same idea the Forbidden City builds at city scale, that power and the afterlife both depend on a connection to the celestial realm.

## On the AP Exam

The bi disc shows up as a detail you use, not a work you identify on its own. The 2024 SAQ Q4 gave an image of the Funeral Banner of Lady Dai (c. 180 BCE) and asked about it directly, and questions like that reward you for citing specific visual evidence. Naming the bi disc and explaining that it symbolizes heaven and marks the soul's ascent is exactly the kind of precise iconographic evidence that earns points. In multiple choice, expect stems about the banner's function or symbolism where the bi disc is the right supporting detail. The move you need to practice is connecting the disc to function. Don't just say "there's a jade disc," say the disc shows the banner was made to guide Lady Dai's soul to the celestial realm.

## bi disc vs Cong (jade tube)

Both are ancient Chinese jade ritual objects, which is why they get mixed up. The bi is a flat disc with a central hole and symbolizes heaven, while the cong is a tube that is square outside and round inside and is associated with earth. For the AP exam, the bi disc is the one that matters, because it appears in the Funeral Banner of Lady Dai.

## Key Takeaways

- A bi disc is a circular jade disc with a hole in the center that symbolizes heaven and the celestial realm in Chinese culture.
- In AP Art History, the bi disc appears in the Funeral Banner of Lady Dai (c. 180 BCE), where dragons thread through it at the point where the soul transitions from earth toward heaven.
- Jade was chosen because the Chinese believed it carried protective, immortal qualities, which made it the ideal material for tomb objects.
- The bi disc is best used as specific visual evidence when explaining the Funeral Banner's function as a cosmological guide for the deceased's soul.
- The term supports learning objective AP Art History 8.3.A in Topic 8.3, which focuses on how cultural beliefs shape art and art making in China and the Koreas.

## FAQs

### What is a bi disc in AP Art History?

A bi disc is a flat circular jade disc with a hole in the center that symbolizes heaven in Chinese culture. On the AP exam, it matters as a symbol inside the Funeral Banner of Lady Dai (c. 180 BCE), a Han dynasty tomb object from Topic 8.3.

### Is the bi disc one of the 250 required works in AP Art History?

No, the bi disc is not a standalone work in the image set. It appears as iconography within the Funeral Banner of Lady Dai, which is a required work, so you need to recognize it and explain its meaning inside that banner.

### What is the difference between a bi disc and a cong?

A bi is a flat jade disc with a central hole symbolizing heaven, while a cong is a jade tube, square on the outside and round on the inside, associated with earth. The bi disc is the one relevant to the AP exam because it appears in the Funeral Banner of Lady Dai.

### What does the bi disc mean in the Funeral Banner of Lady Dai?

Two dragons weave their bodies through the bi disc near the banner's center, marking the threshold where Lady Dai's soul leaves the earthly realm and ascends toward heaven. It's evidence that the banner functioned as a guide for the soul in the afterlife.

### Why were bi discs made of jade?

Jade was the most prized material in ancient China, associated with purity, immortality, and protection of the body after death. That belief is why jade objects like bi discs were buried in tombs, including Han tombs like Lady Dai's at Mawangdui.

## Related Study Guides

- [8.3 Interactions Within and Across Cultures in South, East, and Southeast Asian Art](/ap-art-history/unit-8/interactions-within-across-cultures-south-east-southeast-asian-art/study-guide/VVL39edTFq3MKYverITe)

## Structured Data

```json
{"@context":"https://schema.org","@graph":[{"@type":"LearningResource","@id":"https://fiveable.me/ap-art-history/key-terms/bi-disc#resource","name":"Bi Disc — AP Art History Definition & Exam Guide","url":"https://fiveable.me/ap-art-history/key-terms/bi-disc","learningResourceType":"Concept explainer","educationalLevel":"AP® / High School","about":{"@id":"https://fiveable.me/ap-art-history/key-terms/bi-disc#term"},"audience":{"@type":"EducationalAudience","educationalRole":"student"},"dateModified":"2026-06-11T05:27:00.863Z","isPartOf":{"@type":"Collection","name":"AP Art History Key Terms","url":"https://fiveable.me/ap-art-history/key-terms"},"publisher":{"@type":"Organization","name":"Fiveable","url":"https://fiveable.me"}},{"@type":"DefinedTerm","@id":"https://fiveable.me/ap-art-history/key-terms/bi-disc#term","name":"bi disc","description":"A bi disc is a flat circular jade disc with a hole in the center, an ancient Chinese symbol of heaven and the celestial realm; in AP Art History it appears in the Funeral Banner of Lady Dai (c. 180 BCE), where it marks the soul's passage from earth to heaven in a Han tomb context (Topic 8.3).","url":"https://fiveable.me/ap-art-history/key-terms/bi-disc","inDefinedTermSet":{"@type":"DefinedTermSet","name":"AP Art History Key Terms","url":"https://fiveable.me/ap-art-history/key-terms"}},{"@type":"FAQPage","mainEntity":[{"@type":"Question","name":"What is a bi disc in AP Art History?","acceptedAnswer":{"@type":"Answer","text":"A bi disc is a flat circular jade disc with a hole in the center that symbolizes heaven in Chinese culture. On the AP exam, it matters as a symbol inside the Funeral Banner of Lady Dai (c. 180 BCE), a Han dynasty tomb object from Topic 8.3."}},{"@type":"Question","name":"Is the bi disc one of the 250 required works in AP Art History?","acceptedAnswer":{"@type":"Answer","text":"No, the bi disc is not a standalone work in the image set. It appears as iconography within the Funeral Banner of Lady Dai, which is a required work, so you need to recognize it and explain its meaning inside that banner."}},{"@type":"Question","name":"What is the difference between a bi disc and a cong?","acceptedAnswer":{"@type":"Answer","text":"A bi is a flat jade disc with a central hole symbolizing heaven, while a cong is a jade tube, square on the outside and round on the inside, associated with earth. The bi disc is the one relevant to the AP exam because it appears in the Funeral Banner of Lady Dai."}},{"@type":"Question","name":"What does the bi disc mean in the Funeral Banner of Lady Dai?","acceptedAnswer":{"@type":"Answer","text":"Two dragons weave their bodies through the bi disc near the banner's center, marking the threshold where Lady Dai's soul leaves the earthly realm and ascends toward heaven. It's evidence that the banner functioned as a guide for the soul in the afterlife."}},{"@type":"Question","name":"Why were bi discs made of jade?","acceptedAnswer":{"@type":"Answer","text":"Jade was the most prized material in ancient China, associated with purity, immortality, and protection of the body after death. That belief is why jade objects like bi discs were buried in tombs, including Han tombs like Lady Dai's at Mawangdui."}}]},{"@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"AP Art History","item":"https://fiveable.me/ap-art-history"},{"@type":"ListItem","position":2,"name":"Key Terms","item":"https://fiveable.me/ap-art-history/key-terms"},{"@type":"ListItem","position":3,"name":"Unit 8","item":"https://fiveable.me/ap-art-history/unit-8"},{"@type":"ListItem","position":4,"name":"bi disc"}]}]}
```