When does the chengdu subway system close?

Hello. I'm from Bangkok, Thailand. I have scheduled for travelling to Chongqing & CD city. And by plane, I will arrive at Chongqing around 11 a.m. And I'd like to go to CD on the same day. but after I checked the train schedule, there is no bullet train matching with our time, but there are many trains arriving at CD around 9-11 p.m. So I'd like to ask you about the time which subway system closes because I'm afraid it will close at that time.

Thank You in advance.