The Heavenly Grand Thousand World Explained: How BTTH, Martial Universe, and The Great Ruler Connect

If you have spent any time diving into the modern 3D donghua landscape, you have undoubtedly run into the works of legendary web novel author Tian Can Tu Dou (Heavenly Silkworm Potato). His stories feature some of the most iconic protagonists in the entire xianxia and xuanhuan genres.

But as you jump from watching Xiao Yan manipulate mystical flames to Lin Dong wielding ancestral symbols, a realization hits: these stories aren’t just similar—they are completely interconnected.

Welcome to the Heavenly Grand Thousand World (Da Zhu Zai universe). For casual anime viewers, navigating this massive cosmic hierarchy can be incredibly confusing. Most fans watching The Great Ruler or the prequel series Dragon Prince Yuan (Yuan Zun) have no idea how these individual timelines and dimensions actually fit together. Let’s break down the official roadmap of this shared universe, trace the chronological timeline, and explore how these legendary heroes eventually cross paths.

Grand Thousand World Explained: How BTTH & The Great Ruler Connect

The Cosmic Hierarchy: Lower Planes vs. The Higher Realm

To understand the connection, we first need to look at the structural design of the multiverse. The universe is divided into two distinct levels of existence:

• The Lower Planes: These are smaller, isolated planetary dimensions with limited ambient energy. Both the Dou Qi Continent (from Battle Through the Heavens) and the Tianxuan Continent (from Wu Dong Qian Kun) are classified as Lower Planes. In these worlds, a cultivator can only progress until they hit the absolute ceiling of that specific plane’s energy capacity (such as the Dou Di rank).
• The Great Thousand World: This is the massive, exponentially richer “Upper Plane” that sits at the center of the multiverse. It acts as the ultimate destination where peak experts from thousands of different Lower Planes eventually ascend once they break through their local world barriers.

When Xiao Yan and Lin Dong achieve supreme power at the end of their respective series, they are forced to leave their home planets behind to ascend to this higher dimension, searching for greater cosmic truths (and missing origin Qi).

The Chronological Timeline: From Prequel to The Convergence

Many fans don’t realize that these series do not happen simultaneously. The overarching narrative unfolds across a timeline spanning tens of thousands of years:

1. The Ancient Past: Dragon Prince Yuan (Yuan Zun)

Taking place roughly 50,000 years before the events of the other series, Yuan Zun serves as the deep-lore ancestral prequel to the entire universe. It details the primordial wars of the gods and the initial division of the worlds. Crucially, the ultimate antagonist defeated by Zhou Yuan in this era sets the stage for the cataclysmic threats faced by future generations.

2. The Parallel Eras: BTTH & Wu Dong Qian Kun

Xiao Yan’s journey on the Dou Qi Continent and Lin Dong’s struggle on the Tianxuan Continent occur roughly during the exact same contemporary timeline, just in completely separate dimensions. They have no awareness of each other during their mortal cultivation journeys. However, at the absolute climax of their stories, they break through their respective world barriers and actually witness each other ascending into the Great Thousand World at the exact same moment!

3. The Convergence: The Great Ruler (Da Zhu Zai)

This is where the threads explicitly tie together. The Great Ruler takes place years after those ascensions. By the time the main protagonist, Mu Chen, begins his training, Xiao Yan and Lin Dong have already established themselves as legendary, god-like supreme sovereigns in the higher realm.

The Power Factions: Endless Fire Domain vs. Martial Realm

When our favorite protagonists arrived in the Great Thousand World, they didn’t just lay low; they completely upended the regional power balance. To protect their families and secure their footing against invading Fiend Clans, they established two of the most powerful super-factions in existence:

• The Endless Fire Domain: Founded by Xiao Yan (now revered across the universe as the Flame Emperor). He centralized his domain around advanced alchemy and heavenly flames, turning it into an economic and military powerhouse.
• The Martial Realm: Founded by Lin Dong (known universally as the Martial Ancestor). Wielding his signature Lightning Staff and ancestral symbols, he famously charged into the powerful Ice Spirit Clan entirely by himself to rescue his wife’s soul, shaking the heavens.

As The Great Ruler progresses, Mu Chen directly interacts with, trains alongside, and earns the deep mutual respect of both the Flame Emperor and the Martial Ancestor as they form a united front against darkness.

Which of the three main protagonists do you think wields the absolute ultimate power when they finally share the screen? Let’s talk about it in the comments below!

Last Updated on July 18, 2026 by Yu Alexius