If you don't feel like spending many hours in a train, you can consider travelling by plane. Especially if you have the possibility to book in advance, flying to Chengdu can be definitely cheap.
What are the departure and arrival stations in Handan and Chengdu?
The trains to Chengdu will leave from handanzhan and will arrive at chengduzhan.
How long to you need to get to Chengdu by train?
While the first train to Chengdu leaves at 00:07, the last one is scheduled for 13:07. The average duration of the journey is of 11 hours and 24 minutes, but the fastest trains can get you to Chengdu in 1 hour and 57 minutes.