To travel by local train

Well, high-speed trains depart from Beijing South Railway Station, and will arrive at TJ South Railway Station. It takes around half an hour on the way.
Starting from your hotel near Temple of Heaven, you can take a taxi to get to the station. The cab fare is CNY 20 to 30 in the day time.

Thank you Linda. Actually I fly into TJ and decide to go Beijing by local train but not sure which train station.

Oh, sorry for the wrong guide.

In the case, you can travel from TJ railway station to Beijing south railway station. Upon landing, subway line 2 can take you to TJ station directly.

One thing to remind, upon arrival at Beijing South Railway station, you can go to arrival gate no.7-8 on -1F near south exit to apply for reimbursements to railway and subway ticket.