Son La , a land inhabited for generations by 12 ethnic groups, boasts a rich, unique, and diverse cultural heritage, preserved and passed down through generations. With its diverse topography, soil, and climate, Muong La district has a rich forest ecosystem with many trees hundreds of years old, possessing significant biodiversity, environmental value, cultural and historical significance, and aesthetic value. Currently, the district has 39 recognized heritage trees, ranging in age from 300 to 1,000 years.

Located approximately 40km from the Son La hydroelectric power plant and nearly 80km from Son La city along the TL106 road, Ngoc Chien appears like a beautiful painting, nestled amidst majestic mountain ranges covered with vast expanses of greenery. The commune boasts 7 heritage trees recognized in 2023.

According to records, 7 trees have been recognized as heritage trees, including: Tree No. 1 is a mountain fir tree in Na Tau village; Trees No. 2, 3, and 4 are three individual fig trees forming a fig tree cluster in Luot village; Tree No. 5 is a kapok tree located in the center of Phay village; Trees No. 6 and 7 are two oak trees in Muong Chien village.

Experts believe it is rare to find a locality in the entire country with as many ancient trees and such diverse species as Ngoc Chien.

Besides their ancient age, the old trees in Ngoc Chien commune are also linked to the history of resistance against foreign invaders, or to the ancestors who contributed to reclaiming land and establishing villages. Every year on the 7th day of the first lunar month, people from nearby and distant villages hold ceremonies to worship the tree spirits, praying for favorable weather and prosperous livelihoods.

The seven heritage trees are the pride of the people of Ngoc Chien commune. These ancient trees are closely linked to the formation and development of each village, carrying significant cultural and spiritual value. The commune has promoted and encouraged the people to actively care for and protect the heritage trees, assigning representatives from each village to manage them. Simultaneously, they have developed spiritual tourism destinations, creating livelihoods for the people.

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According to records recognized by the Vietnam Heritage Tree Council, tree number 1 is a mountain fir tree in Na Tau village, known locally as the "sacred tree" - "great fir tree" or "co may pe". This is a large tree over 35m tall, with a diameter of over 100 cm, and is thousands of years old.
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Associate Professor Tran Ngoc Hai, Vice Chairman of the Heritage Tree Council, Vietnam Association for Nature and Environment Protection, stated: Currently, Vietnam has over 6,000 heritage trees, belonging to over 100 different tree families. Among them, the giant fir tree (Sa mu) in Na Tau village and the two oak trees (love trees) in Muong Chien village, Ngoc Chien commune, are two newly recognized heritage trees in Vietnam. Most notably, generations of the same family have participated in protecting these sacred trees in the area; the fir tree alone has been preserved and protected by four generations. These are large, unique trees found only in the surrounding villages and rice fields. It can be said that the heritage trees in Ngoc Chien commune are invaluable assets in terms of genetic resources, ecological environment, and the cultural characteristics of the region.