Hanoi, Vietnam
Vietnam 🇻🇳 #3 Airport bus service. Normally It can take bus number 7 or 17 to Long bien station which close to the center then walk abit but the good update one is bus number 86 from the airport near terminal 2 to drop off at tran quang khai station near Hoan Kiem lake (30,000 VND) free wifi on the bus

P.S. Google map can be search for bus number as well

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