req give weblink book ticket online from shanghai hongqiao station to bengbu and return.

you can book with this site. they will deliver the tickets to your hotel or any appointed place; alternatively, you can pick up the ticket by yourself at any railway station.
here is the link to book the ticket from Shanghai hongqiao to Bengbu:
https://www.travelchinaguide.com/china-trains/display.aspx?tp=1&to1=Bengbu&from1=Shanghai+Hongqiao&depDate=11%2F01%2F2013
remember to choose the date of departure.
the ticket from Bengbu to Shanghai Hongqiao can be booked by "add a trip".