Train service from Nantong to Beijing

Q: You wrote in one of your travel answers that there is train service from Nantong to Beijing. Can you please check again and confirm, as I have failed to get the service schedules for such service.

Look for train Z52. Departing from Nantong at 19:06 and arriving in Beijing next morning. Distance covered is 1,325 km and train travel time is 12 hours and 30 minutes. Need sleeping berth. Cost for a soft sleeping berth is about 450 Chinese dollars. Always veryfy information received, of course.