黒月) is one of the largest criminal syndicates in the Eastern Quarter in Calvard.
One branch was established in Crossbell to take over the black market from Revache. Cao Lee, representative of the Crossbellan branch of Heiyue, disguised Heiyue's building as the Heiyue Trade Company.
- Cao Lee (representative)
- Shing (grandson of Heiyue's elder)
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