I lost train ticket from Shanghai to nanjing return . I hold foreign passport. Pl advise how to get

You can go for the railway station with all the passengers passports and try to report the loss. You can show the passport and inform the staff about ticket details for reference. If they find your record, the staff will print your paper ticket again but at this time, you would need to pay for the full amount. After your boarding, you need to find the conductor and advice he or she that you have report a loss of the ticket and now need a certificate for refund. Finally, after you arrive at the destination, show the ticket and that certificate to the booth and ask for the refund. If you have difficulty in finding the correct booth, you may ask the information desk for help. Good luck!