@Antoine The breeding pair, Shi Tou and A Jing came to the zoo as juveniles in 2009 and had three offsprings in 2013, 2016 and 2019 respectively. I believe their latest kid is living with the parents and at least one of their early children still resides at the zoo.
@Antoine No, it is a Beijing Zoo exclusive. The breeding program for R. brelichi started with seven wild-caught founders in 1992. Most are kept in the breeding center in Mount Fanjing Reserve, the only natural habitat for the species. The Beijing pair is the second generation born in the center and the first ever to breed outside Mount Fanjing. Beijing Zoo is currently the only place in the world where the public can see these monkeys.
@Ding Lingwei Thank you very much for these new infos. It's very interesting. Do you know how many of these animals are kept in Mount Fanjing Reserve Breeding Center ?
Many thanks @Ding Lingwei for your research and this answer.
Three families/groups in 2010 : it's not a lot but if they manage to keep this species for years it's something !