Hi bro,
I have no concrete data to show that chengnai wood can last more than 10 years however, one of my colleague, who have a marine tank with kapor cabinet for more than 5.5 years before decom so I presume chengnai is more solid than kapor so should be able to last longer.
IMHO, beside soild wood used, the cabinet need solid design structure to last longer therefore engaging a good carpenter is very important too !