how can i go for china wall from beijing west railway station time and fare also?

You must refer to the Great Wall, right? There are several sections around the city. I'f reocmmend Badaling Section to you. To reach there, you can take subway line 9 from the West Railway Station to National Library and transfer to line 4 to get off at Xizhimen. Leave exit A1 and walk to the North Railway Station to take a train to Badaling in an hour, with the cost of CNY6. The metro fare is CNY4 per person.