Vegetarian is a prominent theme at the festival, with nearly 60 vegetarian restaurants participating.
They plan to make a national record of cooking 1,000 vegetarian hot pots for visitors on February 7.
Other activities include a flower festival, a lion dance, a martial arts performance, a music show, and folk games.
The spring festival, co-organised by Khai Nguyen Pagoda, the An Lac Business Community, Hanoi Martial Arts Association, and Hanoi Laughter Yoga Club, will last until February 7