i am stay in tanggu area i how to visit for badaling great wall given for me train route

First, please take bullet train from Tanggu to Beijing South Railway Station. Second, take subway line 4 from there to get off at Pinganli Station. Then walk around 100 meters to reach Pinganlilukoubei Station. There you can take Te13 to get off at Deshengmen Station. From there you can take bus no. 877 bus to reach Badaling.

Please do not follow the tour guide on the bus to buy round-trip slideway tickets when you arrive. You can walk around 30 meters to find an entrance which is not far from the slideway ticket office. You just walk into the entrance and buy the ticket to climb the wall.