As one of the 19 ethnic groups in the province, the Hà Nhì predominantly inhabit 21 villages across four bordering communes in Mường Nhé District, namely Sín Thầu, Chung Chải, Sen Thượng, and Leng Su Sìn.

The Hà Nhì's traditional New Year, known as Khù Sự Chà, typically spans three days in December. Similar to other ethnic communities' traditional festivals, it serves as a time for families to express gratitude to their ancestors. The occasion provides an opportunity for people to reunite, reflect on and share experiences from the past year, celebrate the arrival of spring, and extend wishes for a prosperous new year over glasses of wine.

According to Hà Nhì customs, on the morning of the first day of the new year, families prepare bánh trôi (sticky rice cakes) as an offering to their ancestors. This ritual symbolizes the transition from the old to the new year and acts as a symbolic meal for ancestors joining in the New Year celebrations.

During the ceremony, the host molds three large, evenly round cakes, boils them, places them on a fresh banana leaf, sprinkles fragrant roasted sesame seeds, and then offers them on the ancestral altar.

Following the ritual, family members can enjoy the cakes before proceeding to slaughter a pig. The pork serves both as an offering in the ancestral worship ritual and as sustenance for the family during the Tết days.

Offering pork to the ancestors is a mandatory ritual for the Hà Nhì, symbolizing cleanliness and a desire for a fresh start. Before slaughtering the pig, the host pours water over its neck, symbolizing the washing away of misfortunes from the previous year, ushering in a new and better year.

During the pig slaughtering ceremony, the Hà Nhì people have a tradition of examining the pig's liver to predict life in the new year. A healthy and vibrant liver indicates thriving livestock farming and brings luck to the family.

On the second day of Tết, families prepare bánh giầy (round glutinous rice cake) to offer as gifts to distant guests, showcasing the hospitality and warmth of the Hà Nhì people.

Festive visits continue on the second day, with households preparing various dishes and engaging in traditional activities such as singing folk songs and dancing. These elements contribute to a vibrant and joyful Tết atmosphere for the Hà Nhì people on the borderlands of their homeland.