I will arrive in TianJin airport, how do I go striaght to Beijing forbidden City by bullet train?

Hi, you can take a taxi from the airport to the Tianjin railway station first, which will cost you about CNY40. Here, take an inter-city train to Beijing railway station. Then, you can take subway line 4, get off at the Xisikou station, and walk to the Xisikouxi station. At last take Bus 619 to the Forbidden City.