I note that there is a Xiamen-Longyan train which stops in Nanjing (Fujian).

While I understand it isn't close to the tulous, it seems like taking the train and then taking a car or bus from Nanjing would be much faster than taking a bus from Xiamen. Are there tours from the Nanjing station or tour guides with cars from there and would I save time that way? Four hours each way on the bus seems so long!