Hanoi 1 night 2 days / Halong Bay tour for one person / Tet period / Female solo travel

Last trip to Vietnam. This is a travelogue that I moved from Da Nang to Noi Bai Airport, stayed overnight in Hanoi, and returned home on a late-night flight.
Halong Bay tour applied from Klook the day before.
I paid an additional service charge of 100k (¥570) as a tet fee.
Participating alone is a little lonely, but I made friends when I had lunch with the participants.
It was very interesting at the foreign exchange meeting.
It's okay if you don't speak English! I think it's interesting to challenge ^ ^