Would like to check how to go XiQiao Mountain from Crowne Plaza?

Yes, I think so. I went there and think it is beautiful.
You can take a taxi to reach Liuhua Hotel near the local railway station where you can find direct buses to the park directly. The timetable is 08:30, 09:30, 11:30, 14:00, 16:30, 17:30.
Hope you can have a nice trip there.

Is it a round trip bus or one way bus ? how long the journey and how much the bus cost ?

As I know, the buses operate for round trip and schedule for back journey is at 07:00, 08:00, 10:00, 12:30, 15:00 and 16:00. It takes around an hour and the bus fare is CNY15 per person.