I have kept and bred another subspecies, Odontolabis cuvera fallaciosa. I think the breeding of O. c. sinensis is similar.
Like many Odontolabis species the females will lay their eggs into fine substrate next to wood pieces. It is even possible to raise the larvae on a leaf litter substrate with only a minimal part of white rotten wood. Of course, to reach major males in breeding you would need a fermented mat and additives. It is quite interesting that, given enough space, Odontolabis larvae can be kept together and seem to communicate by stridulation. Each larva will build its own cave system and stay inside those confines. Some larva however do invade the caves of the others and eat them. I believe that these will become major males in the wild.