Although system agnostic and not DCC RPG specific, Yoon-Suin is an amazing setting with a unique flavor.

Much like the east portrayed by Marco Polo and Italo Calvino, Yoon-Suin is place of exotic danger, magic, and mystery.

It is available for purchase on lulu.

From the book description:

Yoon-Suin is a campaign toolbox for fantasy games, giving you the equipment necessary to run a sandbox campaign in your own Yoon-Suin – a region of high adventure shrouded in ancient mysteries, opium smoke, great luxury and opulent cruelty.

Contains: A bestiary of unique monsters, including self-mummified monks, liquid golems, tiger-beetle men, figments, and dozens more;
a new character class, the Crab-man; a chapter for each of the major regions of Yoon-Suin, filled with random generators to brainstorm map contents, social groups, and more; extended rules for poisons, tea, opium, trade, deities and so on; extended rules for exploring the Old Town of the Yellow City, and the haunted jungles of Lahag; many encounter tables; well over 100 pre-written adventure locales; purple prose; 320+ pages of usefulness.