I am arriving in Changshui airport at 5pm & plan to take overnight train to Lijiang.

Upon arrival, you can take the airport shuttle bus line 2 to the KM Railway Station directly. Six trains to Lijiang are available there and you can take the train at 20:49, 21:21, 21:48 or 22:14 (the last train). The travel time is 9.5 – 10 hours, and the fare is CNY89 for a hard seat and CNY152 for a hard sleeper.