I will arrive at Guangzhou Baiyun Airport 23:15pm. Is there any train or bus to Jia Mei Hotel?

Is your hotel located at No.51, Guangta Road, Yuexiu District? If yes, you can take shuttle bus line 1 to get to Aviation Ticket Office (Railway Station) first. The operating hours of this bus line will till the last flight. So you can catch it. Don't worry. The ticket fare is CNY 18 per person. After arriving, take a taxi to the destination. The cab fare is CNY 15-20.