I want to know the most fastet trains which can i take to beijing from jinxiang

You may refer to Xinjiang but not Jinxiang, right? If so, you can take the train from Urumuqi South Railway Station, there are two fast trains T70 and T718 to Beijing. The price is about CNY 887 - 901 for the soft sleeper. And the travel time is about 33 – 40 hours.

You are suggested to book the tickets in advance online to make sure that you can have one. As I know, you can book just on this website.

If you refer to Jinxiang County, Jining, i'm afraid there is no train service. You need to go to Jining Railway Station, where you can take a train to your destination. The fastest one is 2073, taking around 9 hours and 40 minutes.