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Overview

Caiyun Basin (彩云盆地), also referenced in CN coverage as Caiyun Plateau, is the new explorable region introduced in the S1 World Beginning Season of Honor of Kings: World. The region unlocks at S1 launch on May 29, 2026 as the first major expansion of the Open World Map beyond the S0 Jixia Academy region and its surrounding plains.

In the broader continent of Primaera, Caiyun Basin sits among the announced post-S0 regions; the launch S0 build covered roughly one-tenth of the full designed world, and S1 begins the season-by-season rollout of the remaining nine-tenths.

S1 Pre-Show Status

Pre-show CN coverage from May 25-27, 2026 confirms the following:

• Arrival: live with the S1 opening patch on May 29, 2026

• Naming: 彩云盆地 (Caiyun Basin) is the canonical Chinese label; English sources also render it as Caiyun Plateau

• Position: first major new exploration region after the S0 Jixia content

• Pairing: launches alongside the new Resonances Sun Shangxiang and Longya plus Chapter 9 (Guixu Dream Performance)

Detailed sub-area breakdowns, NPC rosters, regional currency reputations, and exploration collectibles will be documented after the May 29 patch when in-game data becomes available. This article will be expanded with verified geography once players reach the region.

Confirmed S1 Region Features (Catalog-Level)

S1 ships a set of catalog-level features attached to Caiyun Basin that are documented separately:

• Story unlocks via Chapter 9: Guixu Dream Performance, continuing the 归虚 narrative arc that began in Chapter 8

• Second-half dungeon: Cangmang Riverboat

• New Resonances rooted in or arriving with the region: Sun Shangxiang, Longya, and Fei Han

• Catch-up event for late-joining players, gating onto the region's recommended gear curve, documented separately

Relationship to Future Regions

Caiyun Basin is the first of several already-announced future regions. Per the catalog-level Content Roadmap the post-S1 future-region pipeline also includes 孤叶山 (Solitary Leaf Mountain, with Li Bai content and a Martial Arts Meet), 元初学院 (Yuanchu Academy), and 灭境荒原 (Wasteland of Annihilation). Specific season placement for those regions has not been announced.

S1 Pre-Show Hedging

All claims above are sourced from pre-show CN coverage May 25-27, 2026 (official Tencent S1 PV summary and Chinese guide-site reporting). Granular geography, collectibles, regional NPCs, and exploration tracks (鲲游/众生/溯闻/见闻) for Caiyun Basin will be documented after the May 29 patch.