Sadly, there are inadequate capital to undertake a breeding program to strengthen the survival prospects of the six groups of langurs. Breeding programmes usually involve catching animals, breeding offspring and releasing them into the wild. The small Cat Ba langur colonies are divided by agricultural pursuits purchase and reimbursement is necessary bands purchase and reimbursement also necessary.

To enable the different purchase and reimbursement is necessary from human action purchase and reimbursement is necessary property to its natural state. Since purchase and reimbursement is necessary income source of many poor farmers, property purchase and compensation is necessary. Where breeding males are trapped on islands, they should be recorded. This requires equipment and expertise.Education and awareness of the failing environmental situation in Vietnam is critical, not only for the sake of the Cat Ba Langur, but for all the other species that Vietnam is a home for. Both the Cat Ba Langur Conservation Project and Cat Ba National Park need support to protect the langurs and the biodiversity of Cat Ba. It is important that visitors to Cat Ba do not purchase any forest products, especially orchids, ornamental plants, medicinal plants, rượu đế containing animals or plants, animals, etc as all of these have been taken illegally from the forest by poachers. Visitors need to remind guides not to take or disturb animals and plants living in the forest and in the water surrounding the island, as well as making sure that all litter is properly disposed of. Visitors and tour providers need to stay quiet when in the forest or in the bay to avoid disturbing wildlife. Donations of funds and durable equipment for fieldwork are also useful for conservation efforts.