SolidGames and Big Cheese Studio are developing Chinese Frontiers, a building game set in medieval China "coming soon" to Steam. This involves historical settings, including the chance to work on the Great Wall of China. It was previously announced, so this video is from a couple of months ago, showing off some character design and here's DevLog #17 on Daily Routines. Here's the description:

Embark on an epic journey through medieval China in this immersive building and survival simulation. Begin as a humble worker, learning construction and crafting techniques. Develop your settlement, build workshops, and prepare for the Emperor’s summons to undertake monumental projects along the Great Wall.

Experience an engrossing step-by-step building system, where every meticulously designed structure showcases your growing expertise. As your skills evolve, you'll be able to construct ever more impressive edifices.