Hello, take Metro Line 4 Daxing (northbound to Anheqiao) at Renmin University Station and get off at Haidian Huang Zhuang Station. Transfer to the subway 10 line and get off at Sanyuanqiao Station. Transfer to the airport subway line and get off at T2 terminal. Not counting the waiting time and transfer time, it is about 1 hour for 40 minutes. Hope to adopt.