Train K8745 from Wuyishan to Xiamen Gaoqi

Dear Everybody,

Here's my questions:

1) Is it too early to book for this train on May,31st,2015 ?

2) Will the train schedule change in 2015 ? For now is only 1 trip at 19:40 at Wuyishan to Xiamen Gaoqi.

3) I'm travelling alone, and wanted a soft sleeper for this journey, it is possible to put me in a all female compartment ?

4) Is this K type train going to be punctual in departure and arriving at Xiamen Gaoqi ? Because almost all Chineses Airlines are not punctual and delay time.

5) Is it very noisy in this K type train ? Because this timing is during the sleeping hours.

Thank you